Make sure the CI fails if codecov action fails

Author: Felix Exner

.github/workflows/coverage-build.yml

@@ -42,6 +42,7 @@ jobs:
           skip-tests: true
       - uses: codecov/codecov-action@v4
         with:
+          fail_ci_if_error: true
           file: ros_ws/lcov/total_coverage.info
           flags: unittests
           name: codecov-umbrella