Change version to 1.75.1 (#8559)

RELEASE NOTES: None
diff --git a/version.go b/version.go
index ffdb6ee..468f110 100644
--- a/version.go
+++ b/version.go
@@ -19,4 +19,4 @@
 package grpc
 
 // Version is the current grpc version.
-const Version = "1.75.1-dev"
+const Version = "1.75.1"