chore: fix codecov action error

Author: leangseu-edx

.github/workflows/validate.yml

@@ -18,6 +18,7 @@ jobs:
         node-version: ${{ env.NODE_VER }}
     - run: make validate.ci
     - name: Upload coverage
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         fail_ci_if_error: true
+        token: ${{ secrets.CODECOV_TOKEN }}