Fix windows CD zip

.github/workflows/cd.yml

@@ -60,13 +60,13 @@ jobs:
       - run: flutter pub get
       - name: Build windows
         run: flutter build windows --release
-      - name: 'Tar files'
-        run: tar -cvf windows.tar build\windows\runner\Release\
+      - name: 'Zip files'
+        run: powershell Compress-Archive build\windows\runner\Release\ windows.zip
       - name: upload artifacts
         uses: actions/upload-artifact@v2
         with:
           name: windows-artifact
-          path: windows.tar
+          path: windows.zip
 
   github_release:
     name: Create GitHub Release
@@ -93,5 +93,5 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps
-          asset_name: windows.tar
-          asset_content_type: application/tar
+          asset_name: windows.zip
+          asset_content_type: application/zip