Update dependency codecov to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
codecov	orb	major	5.0.3 → 6.0.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.51%. Comparing base (28e7584) to head (5b118a3).

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #55       +/-   ##
===========================================
+ Coverage   66.43%   81.51%   +15.07%     
===========================================
  Files           2        2               
  Lines         146      119       -27     
  Branches       19       19               
===========================================
  Hits           97       97               
+ Misses         48       21       -27     
  Partials        1        1               

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