Update build-llvm-for-windows.yml

MODFIY

Author: ettela

.github/workflows/build-llvm-for-windows.yml

@@ -28,6 +28,10 @@ jobs:
         cd build
         ninja
 
+    - name: Compress build output
+      run: |
+        Compress-Archive -Path build/* -DestinationPath llvm-windows-build.zip
+
     - name: Create Release
       id: create_release
       uses: actions/create-release@v1
@@ -45,6 +49,6 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: build/
+        asset_path: llvm-windows-build.zip
         asset_name: llvm-windows-build.zip
         asset_content_type: application/zip