Update app.py

app.py

@@ -32,7 +32,7 @@ with gr.Blocks(
         button_primary_background_fill='*secondary_500',
         button_primary_background_fill_dark='*secondary_600'
     )
-) as chatbot:  # This is the correct place for 'as demo'
+) as demo:  # This is the correct place for 'as demo'
 
     chatbot = gr.ChatInterface(
         fn=magic_8_ball,