Update test.yml: upload CODECOV token (#1268)

Author: mfeurer

.github/workflows/test.yml

@@ -114,5 +114,6 @@ jobs:
       uses: codecov/codecov-action@v3
       with:
         files: coverage.xml
+        token: ${{ secrets.CODECOV_TOKEN }}
         fail_ci_if_error: true
         verbose: true