Update tests.yml (#8268)

Author: sijunhe

.github/workflows/tests.yml

@@ -24,4 +24,6 @@ jobs:
       - name: run the command
         run: make test
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}