Merge branch 'chore/bump-gitlab-shell' into 'master'

Update Gitlab Shell version to 14.20.0

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120651



Merged-by: Igor Drozdov <idrozdov@gitlab.com>
Approved-by: Igor Drozdov <idrozdov@gitlab.com>
Co-authored-by: Joe Woodward <jwoodward@gitlab.com>