chore: upgrade GitHub Actions versions

[vinitkumar]

Summary

• upgrade outdated GitHub Actions versions listed in the repository audit
• align workflow action references with their current supported versions

Testing

• not run (workflow-only change)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.94%. Comparing base (732601d) to head (acc0730).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #177   +/-   ##
=======================================
  Coverage   98.94%   98.94%           
=======================================
  Files          71       71           
  Lines        1229     1229           
  Branches       70       70           
=======================================
  Hits         1216     1216           
  Misses          8        8           
  Partials        5        5           

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[fsbraun]

@vinitkumar Can you check the tests please?

[vinitkumar]

@fsbraun We should be archiving this one too, right?