Make cards in project mirror-repo settings Pajamas-compliant

Related issue: #394908 (closed)

What does this MR do and why?

Make cards in app/views/projects/mirrors/_mirror_repos_list.html.haml Pajamas-compliant

Screenshots or screen recordings

before	after

How to set up and validate locally

1. Open Project Settings -> Repository -> Mirroring Repositories in any project.
2. Check the card section as per the screenshot above
3. No visible changes

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.