fixed a speeling mistake that kills the CI job

Author: Spyro24

.github/workflows/main.yml

@@ -103,7 +103,7 @@ jobs:
       - name: PyInstaller Windows
         run: |
           pip install pyinstaller
-          pyinstaller --onefile --name UStoat --distpath dist --workpath build --specpath build main.py
+          pyinstaller --onefile --name UStoat --distpath dist --workpath build --specpath build main.pyw
           
       - name: Upload Windows artifact
         uses: actions/upload-artifact@v4