Bump codecov/codecov-action from 5.4.2 to 5.4.3

Bumps [codecov/codecov-action](https://github.com/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
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/unit_tests.yml

@@ -72,7 +72,7 @@ jobs:
           uv run pytest tests/test_imports.py
 
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v5.4.2
+        uses: codecov/codecov-action@v5.4.3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml