Bump codecov/codecov-action from 3.1.4 to 3.1.5

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3.1.4...v3.1.5)

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

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

.github/workflows/tests.yml

@@ -137,7 +137,7 @@ jobs:
 
       # Coverage:
       - name: Upload coverage report to codecov
-        uses: codecov/[email protected].4
+        uses: codecov/[email protected].5
         if: steps.check_files.outputs.files_exists == 'true' && runner.os == 'Linux'
         with:
           file: ./coverage.xml # optional