Update main.yml

Author: yeonjuan

Diff for: .github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
         with:
           cmd: check:all
       - name: Code coverage report
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v2
         with:
           yml: ./codecov.yml
           token: ${{ secrets.CODECOV_TOKEN }}