Merge branch 'squash-merge-origin-docs' into 'master'

Add the origin of squash merge feature to the docs

See merge request gitlab-org/gitlab!63171

doc/user/project/merge_requests/squash_and_merge.md

@@ -7,7 +7,7 @@ type: reference, concepts
 
 # Squash and merge **(FREE)**
 
-> - [Moved](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/18956) to GitLab Free in 11.0.
+> - [Moved](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/18956) from GitLab Premium to GitLab Free in 11.0.
 
 With squash and merge you can combine all your merge request's commits into one
 and retain a clean history.