Bump codecov/codecov-action from 4.6.0 to 5.0.0 in /.github/workflows

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 4.6.0 to 5.0.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v4.6.0...v5.0.0)

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

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

.github/workflows/codecov.yml

@@ -42,7 +42,7 @@ jobs:
           python -m pytest tests/ -v --cov-report term-missing --cov=lessons --cov-report=xml
         # yamllint enable rule:line-length
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v4.6.0
+        uses: codecov/codecov-action@v5.0.0
         with:
           token: ${{ secrets.codecov_token }}
           files: coverage.xml