Update GitHub Action Versions

[seb5g]

GitHub Actions Version Updates

• actions/checkout published a new release v5.0.0 on 2025-08-11T12:39:13Z
• actions/download-artifact published a new release v5.0.0 on 2025-08-05T21:38:42Z
• ad-m/github-push-action published a new release v1.0.0 on 2025-09-12T17:47:29Z
• actions/setup-python published a new release v6.0.0 on 2025-09-04T03:14:37Z
• codecov/codecov-action published a new release v5.5.1 on 2025-09-04T14:36:56Z

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.95%. Comparing base (de15e3a) to head (3b0d0df).
⚠️ Report is 2 commits behind head on 1.0.x_dev.

Additional details and impacted files

@@            Coverage Diff             @@
##           1.0.x_dev      #67   +/-   ##
==========================================
  Coverage      74.95%   74.95%           
==========================================
  Files             18       18           
  Lines           1677     1677           
==========================================
  Hits            1257     1257           
  Misses           420      420           

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