Use uv compatible syntax in test-requirements.txt

[codecov[bot]]

Codecov Report

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

Project coverage is 83.37%. Comparing base (8b18925) to head (8b2bcd0). Report is 40 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #842 +/- ## ======================================= Coverage 83.37% 83.37% ======================================= Files 22 22 Lines 4813 4813 Branches 1302 1302 ======================================= Hits 4013 4013 Misses 526 526 Partials 274 274 ```

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