chore: update tagline to "classic, reliable, trusted"

[mark-wiemer]

PR Checklist

• Addresses an existing open issue: fixes 📝 Docs: Update Mocha tagline #5634
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Also optically aligned the text in mocha-banner.svg by reducing its size. Aimed to keep a consistent padding on left and right, won't be pixel perfect but pretty close. I'm not sure we even use that image anymore :D

[mark-wiemer]

@copilot don't change this PR but can you tell me where we use each modified file in this PR? if not that's OK

[Copilot]

@mark-wiemer I've opened a new pull request, #5636, to work on those changes. Once the pull request is ready, I'll request review from you.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.40%. Comparing base (ddf8644) to head (93f330b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5635   +/-   ##
=======================================
  Coverage   88.40%   88.40%           
=======================================
  Files          66       66           
  Lines        4787     4787           
  Branches      977      977           
=======================================
  Hits         4232     4232           
  Misses        555      555           

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[JoshuaKGoldberg]

LGTM overall, but the updated banner svg looks cut off to me?

stale