fix all workflow filenames to yml

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.61%. Comparing base (a55ec52) to head (8663d40). Report is 20 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #115 +/- ## ========================================== + Coverage 76.79% 84.61% +7.82% ========================================== Files 10 10 Lines 754 754 ========================================== + Hits 579 638 +59 + Misses 175 116 -59 ```

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