CI: Use shorter readiness times

[tvdeyen]

This should lead to faster DB service startups.

Ref: github/docs#43243

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.47%. Comparing base (64ec670) to head (d73e7fb).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3725   +/-   ##
=======================================
  Coverage   97.47%   97.47%           
=======================================
  Files         314      314           
  Lines        8303     8303           
=======================================
  Hits         8093     8093           
  Misses        210      210           

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[alchemycms-bot]

💚 All backports created successfully

Status	Branch	Result
✅	8.0-stable
✅	8.1-stable

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details