Merge branch 'pl-check-ruby-syntax' into 'master'

CI: Check Ruby syntax

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/140332



Merged-by: Lin Jen-Shin <jen-shin@gitlab.com>
Approved-by: Lin Jen-Shin <jen-shin@gitlab.com>
Reviewed-by: Peter Leitzen <pleitzen@gitlab.com>
Reviewed-by: Lin Jen-Shin <jen-shin@gitlab.com>
Co-authored-by: Peter Leitzen <pleitzen@gitlab.com>