ci(stylua): upgrade 'stylua-action' to v4

[codecov[bot]]

Codecov Report

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

Project coverage is 72.44%. Comparing base (d5c9c57) to head (b5fffb6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #139 +/- ## ======================================= Coverage 72.44% 72.44% ======================================= Files 7 7 Lines 450 450 ======================================= Hits 326 326 Misses 124 124 ```

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