[skip ci]chore: use codecov action to upload test result

Author: sunggun-yu

.github/workflows/test.yaml

@@ -21,4 +21,7 @@ jobs:
       - name: Run Test
         run: go test ./... -coverprofile=coverage.out -covermode=atomic
       - name: Upload coverage to Codecov
-        run: bash <(curl -s https://codecov.io/bash)
+        uses: codecov/codecov-action@v5
+        with:
+          files: ./coverage.out
+          token: ${{ secrets.CODECOV_TOKEN }}