Bump codecov/codecov-action from 4 to 5 (JabRef#12209)

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

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

.github/workflows/tests.yml

@@ -322,7 +322,7 @@ jobs:
           CI: "true"
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
           DBMS: "postgresql"
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v5
         if: (github.ref == 'refs/heads/main') && (steps.checksecrets.outputs.secretspresent == 'YES')
         with:
           token: ${{ secrets.CODECOV_TOKEN }}