Update GitHub Actions to latest versions

[gartmeier]

Bumps GitHub Actions to latest versions to fix failing CI. The old cache action was breaking the test runs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.28%. Comparing base (5835dcb) to head (4afe5d3).
⚠️ Report is 26 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #933      +/-   ##
==========================================
- Coverage   90.95%   90.28%   -0.67%     
==========================================
  Files          11       11              
  Lines         851      865      +14     
  Branches      157      119      -38     
==========================================
+ Hits          774      781       +7     
- Misses         52       61       +9     
+ Partials       25       23       -2     

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