Merge branch '442441_fix_commit_id_regex' into 'master'

Use a correct COMMIT_ID detection regex for prohibited branches

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145406



Merged-by: Allison Browne <abrowne@gitlab.com>
Approved-by: Gavin Hinfey <ghinfey@gitlab.com>
Approved-by: Allison Browne <abrowne@gitlab.com>
Co-authored-by: Vasilii Iakliushin <viakliushin@gitlab.com>