Pass explicit list of files with the coverage

Author: antonwolfy

.github/workflows/generate_coverage.yaml

@@ -145,3 +145,4 @@ jobs:
         uses: coverallsapp/github-action@648a8eb78e6d50909eff900e4ec85cab4524a45b # v2.3.6
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
+          files: coverage-cpp.lcov coverage-python.lcov