ci: checkout latest code in prod deploy script

Author: cybex-dev

.github/workflows/flutter_web-build-deploy.yml

@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-#      - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
       - name: Download Production Artifact
         uses: actions/download-artifact@v4