Merge branch 'docs-go1.10' into 'master'

Drop support for Go 1.9 in GitLab 11.4

Closes #51982

See merge request gitlab-org/gitlab-ce!22324

doc/update/11.3-to-11.4.md

@@ -80,8 +80,8 @@ More information can be found on the [yarn website](https://yarnpkg.com/en/docs/
 
 ### 5. Update Go
 
-NOTE: GitLab 11.0 and higher only supports Go 1.9.x and newer, and dropped support for Go
-1.5.x through 1.8.x. Be sure to upgrade your installation if necessary.
+NOTE: GitLab 11.4 and higher only supports Go 1.10.x and newer, and dropped support for Go
+1.9.x. Be sure to upgrade your installation if necessary.
 
 You can check which version you are running with `go version`.