Bump codecov/codecov-action from 4 to 5 in the actions group (#708)

* Bump codecov/codecov-action from 4 to 5 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 4 to 5
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4...v5)

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

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

* Use `files` instead of deprecated `file`.

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Ezio Melotti <ezio.melotti@gmail.com>

.github/workflows/ci.yml

@@ -40,10 +40,10 @@ jobs:
         run: |
           uvx --with tox-uv tox -e py
 
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         if: always()
         with:
-          file: ./coverage.xml
+          files: ./coverage.xml
           flags: Python_${{ matrix.python-version }}
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_ORG_TOKEN }}