Fixing zipping

Author: Hanprogramer

.github/workflows/build-release.yml

@@ -67,6 +67,7 @@ jobs:
     needs: create-release
     steps:
       - uses: actions/checkout@v2
+      - uses: montudor/action-zip@v1.0.0
       - uses: subosito/flutter-action@v1
         with:
           channel: beta