Merge branch...

Merge branch 'docs/51295-update-documentation-for-interactive-web-terminals-to-remove-beta-indicator' into 'master'

Remove beta from web terminal documentation

Closes #51295

See merge request gitlab-org/gitlab-ce!21641

doc/ci/interactive_web_terminal/index.md

 # Getting started with interactive web terminals
 
-> Introduced in GitLab 11.3.
-
-CAUTION: **Warning:**
-Interactive web terminals are in beta, so they might not work properly and
-lack features. For more information [follow issue #25990](https://gitlab.com/gitlab-org/gitlab-ce/issues/25990).
+> [Introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/50144) in GitLab 11.3.
 
 Interactive web terminals give the user access to a terminal in GitLab for
 running one-of commands for their CI pipeline.