cmd/protoc-gen-go-grpc: update version for release (#5070)

diff --git a/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go b/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
index 50cc9da..cb4b3c2 100644
--- a/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
+++ b/balancer/grpclb/grpc_lb_v1/load_balancer_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/lb/v1/load_balancer.proto
 
diff --git a/channelz/grpc_channelz_v1/channelz_grpc.pb.go b/channelz/grpc_channelz_v1/channelz_grpc.pb.go
index ee425c2..d8803d0 100644
--- a/channelz/grpc_channelz_v1/channelz_grpc.pb.go
+++ b/channelz/grpc_channelz_v1/channelz_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/channelz/v1/channelz.proto
 
diff --git a/cmd/protoc-gen-go-grpc/main.go b/cmd/protoc-gen-go-grpc/main.go
index 7f104da..58cde2e 100644
--- a/cmd/protoc-gen-go-grpc/main.go
+++ b/cmd/protoc-gen-go-grpc/main.go
@@ -38,7 +38,7 @@
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-const version = "1.1.0"
+const version = "1.2.0"
 
 var requireUnimplemented *bool
 
diff --git a/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go b/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
index a02c458..fd55176 100644
--- a/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
+++ b/credentials/alts/internal/proto/grpc_gcp/handshaker_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/gcp/handshaker.proto
 
diff --git a/examples/features/proto/echo/echo_grpc.pb.go b/examples/features/proto/echo/echo_grpc.pb.go
index e1d24b1..cf1ffe7 100644
--- a/examples/features/proto/echo/echo_grpc.pb.go
+++ b/examples/features/proto/echo/echo_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: examples/features/proto/echo/echo.proto
 
diff --git a/examples/helloworld/helloworld/helloworld_grpc.pb.go b/examples/helloworld/helloworld/helloworld_grpc.pb.go
index ae27dfa..b142348 100644
--- a/examples/helloworld/helloworld/helloworld_grpc.pb.go
+++ b/examples/helloworld/helloworld/helloworld_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: examples/helloworld/helloworld/helloworld.proto
 
diff --git a/examples/route_guide/routeguide/route_guide_grpc.pb.go b/examples/route_guide/routeguide/route_guide_grpc.pb.go
index efa7c28..32f7910 100644
--- a/examples/route_guide/routeguide/route_guide_grpc.pb.go
+++ b/examples/route_guide/routeguide/route_guide_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: examples/route_guide/routeguide/route_guide.proto
 
diff --git a/health/grpc_health_v1/health_grpc.pb.go b/health/grpc_health_v1/health_grpc.pb.go
index bdc3ae2..69f525d 100644
--- a/health/grpc_health_v1/health_grpc.pb.go
+++ b/health/grpc_health_v1/health_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/health/v1/health.proto
 
diff --git a/internal/proto/grpc_lookup_v1/rls_grpc.pb.go b/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
index 39d79e1..3afbf89 100644
--- a/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
+++ b/internal/proto/grpc_lookup_v1/rls_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/lookup/v1/rls.proto
 
diff --git a/interop/grpc_testing/benchmark_service_grpc.pb.go b/interop/grpc_testing/benchmark_service_grpc.pb.go
index f4e4436..0e6f21e 100644
--- a/interop/grpc_testing/benchmark_service_grpc.pb.go
+++ b/interop/grpc_testing/benchmark_service_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/testing/benchmark_service.proto
 
diff --git a/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go b/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
index 4bf3fce..f327326 100644
--- a/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
+++ b/interop/grpc_testing/report_qps_scenario_service_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/testing/report_qps_scenario_service.proto
 
diff --git a/interop/grpc_testing/test_grpc.pb.go b/interop/grpc_testing/test_grpc.pb.go
index 137a1e9..9a39fdd 100644
--- a/interop/grpc_testing/test_grpc.pb.go
+++ b/interop/grpc_testing/test_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/testing/test.proto
 
diff --git a/interop/grpc_testing/worker_service_grpc.pb.go b/interop/grpc_testing/worker_service_grpc.pb.go
index a97366d..0c4e10a 100644
--- a/interop/grpc_testing/worker_service_grpc.pb.go
+++ b/interop/grpc_testing/worker_service_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: grpc/testing/worker_service.proto
 
diff --git a/profiling/proto/service_grpc.pb.go b/profiling/proto/service_grpc.pb.go
index a065614..218c612 100644
--- a/profiling/proto/service_grpc.pb.go
+++ b/profiling/proto/service_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: profiling/proto/service.proto
 
diff --git a/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go b/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
index 7d05c14..4e6a6b1 100644
--- a/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
+++ b/reflection/grpc_reflection_v1alpha/reflection_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: reflection/grpc_reflection_v1alpha/reflection.proto
 
diff --git a/reflection/grpc_testing/test_grpc.pb.go b/reflection/grpc_testing/test_grpc.pb.go
index 235b5d8..c9a4612 100644
--- a/reflection/grpc_testing/test_grpc.pb.go
+++ b/reflection/grpc_testing/test_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: reflection/grpc_testing/test.proto
 
diff --git a/stress/grpc_testing/metrics_grpc.pb.go b/stress/grpc_testing/metrics_grpc.pb.go
index 0730fad..29fa088 100644
--- a/stress/grpc_testing/metrics_grpc.pb.go
+++ b/stress/grpc_testing/metrics_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: stress/grpc_testing/metrics.proto
 
diff --git a/test/grpc_testing/test_grpc.pb.go b/test/grpc_testing/test_grpc.pb.go
index 76b3935..b328eaa 100644
--- a/test/grpc_testing/test_grpc.pb.go
+++ b/test/grpc_testing/test_grpc.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
 // versions:
-// - protoc-gen-go-grpc v1.1.0
+// - protoc-gen-go-grpc v1.2.0
 // - protoc             v3.14.0
 // source: test/grpc_testing/test.proto