chore: generate xml coverage instead of html

[jooola]

User should generate a html report and open it themselves.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.94%. Comparing base (f7a5e18) to head (d8a839e).
⚠️ Report is 25 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #494   +/-   ##
=======================================
  Coverage   92.94%   92.94%           
=======================================
  Files          64       64           
  Lines        3021     3021           
=======================================
  Hits         2808     2808           
  Misses        213      213           

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