Bump codecov/codecov-action from 5.3.1 to 5.4.0 in the actions group (#703)

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


Updates `codecov/codecov-action` from 5.3.1 to 5.4.0
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v5.3.1...v5.4.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -52,7 +52,7 @@ jobs:
           python -m pytest
 
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v5.3.1
+        uses: codecov/codecov-action@v5.4.0
         with:
           file: ./coverage.xml
           flags: unittests