chore: Pin GitHub Actions dependencies with pinact

[quant-ranger]

This PR automatically pins GitHub Actions dependencies to their commit SHAs for security using pinact.

Pinning dependencies to specific commit SHAs helps prevent supply chain attacks and ensures reproducible builds.

If you run into any problems, feel free to ping @ManuelLerchnerQC.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.86%. Comparing base (232d8f4) to head (348af97).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #318   +/-   ##
=======================================
  Coverage   92.86%   92.86%           
=======================================
  Files          21       21           
  Lines        2061     2061           
=======================================
  Hits         1914     1914           
  Misses        147      147           

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