Update codecov/codecov-action action to v3.1.4

.github/workflows/test.yml

@@ -67,7 +67,7 @@ jobs:
               chmod +x edgevpn
               EDGEVPNCONFIG=config.yaml ./.github/tests.sh
       - name: Codecov
-        uses: codecov/[email protected].3
+        uses: codecov/[email protected].4
         with:
           file: coverage.txt