powershell for windows build zipping

.github/workflows/build.yml

       run: |
         ./build_win.sh
       shell: bash
+    - name: Create archive of build results
+      run: |
+        powershell Compress-Archive build/dist/win build/dist/OctoTray_Win.zip
     - name: Archive build result artifacts
       uses: actions/upload-artifact@v2
       with:

build_win.sh

 cd build/win
 python setup_win.py py2exe
 
-zip -r OctoTray_Win.zip dist/*
-
 cd ../..
-mkdir -p build/dist
-cp -r build/win/OctoTray_Win.zip build/dist/
+mkdir -p build/dist/win
+cp -r build/win/dist/* build/dist/win/