Update conda action

[RemDelaporteMathurin]

Similar to festim-dev/FESTIM-workshop#80

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.55%. Comparing base (42810ca) to head (3e2e8fa).
Report is 90 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #928   +/-   ##
=======================================
  Coverage   99.55%   99.55%           
=======================================
  Files          60       60           
  Lines        2719     2719           
=======================================
  Hits         2707     2707           
  Misses         12       12           

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