Bump codecov/codecov-action from 5.4.2 to 5.4.3 in the actions group

Bumps the actions group with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 5.4.2 to 5.4.3
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.4.2...v5.4.3)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: 5.4.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/tests.yml

@@ -49,7 +49,7 @@ jobs:
         run: pixi run -e ${{ matrix.environment }} tests -n 3
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/[email protected].2
+        uses: codecov/[email protected].3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           slug: scikit-learn-contrib/imbalanced-learn