chore(main): release aiplatform 1.4.0 (#5553)

.release-please-manifest-submodules.json

diff --git a/.release-please-manifest-submodules.json b/.release-please-manifest-submodules.json
index 561dbdb..63fd045b 100644
--- a/.release-please-manifest-submodules.json
+++ b/.release-please-manifest-submodules.json
@@ -1,7 +1,7 @@
 {
   "accessapproval": "1.1.0",
   "accesscontextmanager": "1.1.0",
-  "aiplatform": "1.3.0",
+  "aiplatform": "1.4.0",
   "analytics": "0.3.0",
   "apigateway": "1.1.0",
   "apigeeconnect": "1.1.0",

aiplatform/CHANGES.md

diff --git a/aiplatform/CHANGES.md b/aiplatform/CHANGES.md
index 10440f3..5ebf036 100644
--- a/aiplatform/CHANGES.md
+++ b/aiplatform/CHANGES.md
@@ -1,5 +1,12 @@
 # Changes
 
+## [1.4.0](https://github.com/googleapis/google-cloud-go/compare/aiplatform/v1.3.0...aiplatform/v1.4.0) (2022-02-14)
+
+
+### Features
+
+* **aiplatform:** add file for tracking version ([17b36ea](https://github.com/googleapis/google-cloud-go/commit/17b36ead42a96b1a01105122074e65164357519e))
+
 ## [1.3.0](https://www.github.com/googleapis/google-cloud-go/compare/aiplatform/v1.2.0...aiplatform/v1.3.0) (2022-02-03)
 
 

aiplatform/internal/version.go

diff --git a/aiplatform/internal/version.go b/aiplatform/internal/version.go
index bb0fead..9fa087b 100644
--- a/aiplatform/internal/version.go
+++ b/aiplatform/internal/version.go
@@ -15,4 +15,4 @@
 package internal
 
 // Version is the current tagged release of the library.
-const Version = "1.3.0"
+const Version = "1.4.0"