Merge branch 'renovate-gems/testing-gems' into 'master'

Update dependency webmock to '~> 3.20.0'

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143983



Merged-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Approved-by: Nao Hashizume <nhashizume@gitlab.com>
Approved-by: Vitali Tatarintev <vtatarintev@gitlab.com>
Reviewed-by: Nao Hashizume <nhashizume@gitlab.com>
Co-authored-by: GitLab Renovate Bot <gitlab-bot@gitlab.com>