Update app.py

app.py

@@ -241,7 +241,7 @@ def chat(message, history):
             #tool_outputs=generate_tool_outputs(tool_call_ids, tool_call_results)
             tool_outputs={
                 "tool_call_id": tool_call_ids[0],
-                "output": tool_call_results[0].to_json()
+                "output": tool_call_results[0]
             }
         )