fix: disable cdn graphql

Author: velopert

.github/workflows/main.yml

@@ -33,7 +33,7 @@ jobs:
       run: npm run build:ci
       env:
         REACT_APP_API_HOST: 'https://v2.velog.io/'
-        REACT_APP_GRAPHQL_HOST: 'https://v2cdn.velog.io/'
+        REACT_APP_GRAPHQL_HOST: 'https://v2.velog.io/'
         REACT_APP_GRAPHQL_HOST_NOCDN: 'https://v2.velog.io/'
         PUBLIC_URL: 'https://static.velog.io/'
         REACT_APP_REDIS_HOST: ${{ secrets.REDIS_HOST }}