Pin codecov/codecov-action action to 671740a

Author: renovate[bot]

.github/workflows/main.yml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Upload test results to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5
         with:
           report_type: test_results
           token: ${{ secrets.CODECOV_TOKEN }}