ci: bump codecov/codecov-action from 5.0.7 to 5.1.1

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 5.0.7 to 5.1.1.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.0.7...v5.1.1)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/tests.yml

@@ -90,7 +90,7 @@ jobs:
           matrix.os == 'ubuntu-latest' &&
           matrix.python-version == '3.11' &&
           github.event.pull_request.user.login != 'dependabot[bot]'
-        uses: codecov/codecov-action@v5.0.7
+        uses: codecov/codecov-action@v5.1.1
         with:
           files: tests/coverage.xml
           token: ${{ secrets.CODECOV_TOKEN }}