Fix workflow warning

[martincostello]

Remove deprecated file input for codecov/codecov-action.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.56%. Comparing base (08ea549) to head (67f76d8).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1511   +/-   ##
=======================================
  Coverage   93.56%   93.56%           
=======================================
  Files          49       49           
  Lines         606      606           
  Branches       54       54           
=======================================
  Hits          567      567           
  Misses         23       23           
  Partials       16       16           

Flag	Coverage Δ
linux	93.56% <ø> (ø)
macos	93.56% <ø> (ø)
windows	93.56% <ø> (ø)

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