Add Ruby 3.1 and 3.2 support for gitlab-slim-ruby image (!734) · Merge requests · GitLab.org / gitlab-build-images · GitLab

What does this MR do and why?

Describe in detail what your merge request does and why.

Checklist

(If applicable) Add patches if required for upgrading Ruby version in https://gitlab.com/gitlab-org/gitlab-build-images/-/tree/master/patches/ruby.