chore: update codecov-action v3→v5 for Node.js 24

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Linuxdazhao

.github/workflows/ci.yml

@@ -188,7 +188,7 @@ jobs:
         run: cargo tarpaulin --out Xml
 
       - name: Upload to codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v5
         with:
           file: ./cobertura.xml
           fail_ci_if_error: true