chore: Update CI actions

[mister-ben]

• Bump actions to supported versions
• Replace deprecated set-output
• Disable app armor, as it breaks Chromium Headless

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.78%. Comparing base (61b8db9) to head (2f24f3a).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #46      +/-   ##
==========================================
+ Coverage   87.60%   87.78%   +0.17%     
==========================================
  Files          18       18              
  Lines        1283     1277       -6     
  Branches      342      338       -4     
==========================================
- Hits         1124     1121       -3     
+ Misses        159      156       -3     

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