Merge branch 'renovate/rubygems-and-bundler' into 'master'

Update Rubygems and Bundler

See merge request !2642



Merged-by: Jason Plum <jplum@gitlab.com>
Approved-by: Lucas Li <lli@gitlab.com>
Approved-by: Jason Plum <jplum@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>