Fixed indentation problem

app.py

@@ -14,7 +14,7 @@ with gr.Blocks() as demo:  # Create a Blocks context
   )
 
   def listen_for_messages():
-      def handle_message(event):
+    def handle_message(event):
       if event.data.type == 'initial_input':
           iface.update(inputs=[event.data.project_data, event.data.question])
       else: