🐛 Bug: Mobile & medium footers should center-align icons

[JoshuaKGoldberg]

Bug Report Checklist

• [X] I have searched for related issues and found none that matched my issue.
• [X] This is the appropriate issue form for the bug I would like to report.

Expected

Right-aligning the icons should only happen in large viewports.

Actual

It's happening even on center-aligned smaller footers:

Additional Info

No response