Update test-coverage.yaml

Author: zankrut20

.github/workflows/test-coverage.yaml

@@ -57,7 +57,7 @@ jobs:
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v5.5.2
         with:
-          file: ./cobertura.xml
+          files: ./cobertura.xml
           flags: unittests
           name: codecov-umbrella
           fail_ci_if_error: false