CI: Use micromamba action

[snowman2]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.56%. Comparing base (efa3faa) to head (c377448).
Report is 18 commits behind head on main.

❗ Current head c377448 differs from pull request most recent head 02382d8

Please upload reports for the commit 02382d8 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1381      +/-   ##
==========================================
+ Coverage   96.40%   96.56%   +0.16%     
==========================================
  Files          20       20              
  Lines        1810     1807       -3     
==========================================
  Hits         1745     1745              
+ Misses         65       62       -3     

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