Merge branch 'jv-document-update-script' into 'master'

Document scripts/update-workhorse for releasing NO CHANGELOG

See merge request gitlab-org/gitlab-workhorse!668

PROCESS.md

@@ -42,6 +42,7 @@ maintainers. The release process is:
 -   the new version will only be deployed to `gitlab.com` if [`GITLAB_WORKHORSE_VERSION`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/GITLAB_WORKHORSE_VERSION) is updated accordingly;
     if applicable, please remind the person who originally asked for a new release to make this change
     (the MR should include a link back to the [version tag](https://gitlab.com/gitlab-org/gitlab-workhorse/-/tags) and a copy of the changelog)
+-   the person who updates GITLAB_WORKHORSE_VERSION should also run `scripts/update-workhorse` after commiting the new GITLAB_WORKHORSE_VERSION. If they forget they will be reminded by CI.
 
 ## Security releases