Runtime error quickfix

ZeroGPU client internals have slightly changed and broke this Space (as it starts Gradio server manually instead of relying on `demo.launch`).

This will be improved so ZeroGPU client can work smoothly in this scenario but here is a quickfix in the meantime

gradio_app.py

@@ -766,4 +766,6 @@ if __name__ == '__main__':
         torch.cuda.empty_cache()
     demo = build_app()
     app = gr.mount_gradio_app(app, demo, path="/")
+    from spaces import zero
+    zero.startup()
     uvicorn.run(app, host=args.host, port=args.port)