chore(action): update codecov/codecov-action action to v6

Author: renovate[bot]

.github/workflows/node-ci.yml

@@ -48,7 +48,7 @@ jobs:
       - run: npx @gravityci/cli ./lib/
         env:
           GRAVITY_TOKEN: ${{ secrets.GRAVITY_TOKEN }}
-      - uses: codecov/codecov-action@75cd11691c0faa626561e295848008c8a7dddffe # v5.5.4
+      - uses: codecov/codecov-action@57e3a136b779b570ffcdbf80b3bdc90e7fab3de2 # v6.0.0
   release:
     needs:
       - verify