Fix codecov arguments

[csala]

Fix a warning about deprecated arguments in the codecov action and also use the token argument instead of the envvar in an attempt to fix the tokenless upload in contributor PRs

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.61%. Comparing base (0deb95d) to head (ea0aec9).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master      #10   +/-   ##
=======================================
  Coverage   93.61%   93.61%           
=======================================
  Files           2        2           
  Lines          47       47           
=======================================
  Hits           44       44           
  Misses          3        3           

Flag	Coverage Δ
pytests	93.61% <ø> (ø)

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