Replace deprecated argument for codecov action

[Flamefire]

See https://github.com/codecov/codecov-action?tab=readme-ov-file#usage

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.61%. Comparing base (6607510) to head (97d0d8e).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #105      +/-   ##
===========================================
- Coverage    87.73%   87.61%   -0.13%     
===========================================
  Files           10       10              
  Lines          848      880      +32     
===========================================
+ Hits           744      771      +27     
- Misses         104      109       +5     

see 5 files with indirect coverage changes

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