[CI/CD] update Dependabot

[felixdittrich92]

This PR:

• Extend dependabot to keep actions updated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.56%. Comparing base (b411109) to head (97489a6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1768      +/-   ##
==========================================
- Coverage   96.58%   96.56%   -0.02%     
==========================================
  Files         164      164              
  Lines        7895     7895              
==========================================
- Hits         7625     7624       -1     
- Misses        270      271       +1     

Flag	Coverage Δ
unittests	96.56% <ø> (-0.02%)	⬇️

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