Update gitlab-dangerfiles

What does this MR do and why?

Update gitlab-dangerfiles. Mainly for gitlab-org/ruby/gems/gitlab-dangerfiles!219 (merged)

Keep in mind that when the designated reviewer is not available by being busy, Pedro can be picked for Community contribution even when there's a designer for that group!

Screenshots or screen recordings

UX and groupsource code and Community contribution

When @mle is busy:

UX and groupcode review and Community contribution

UX and groupcode review

UX and no group

There's no UX reviewer row.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.