Update gradio-client.mdx

import code refactor

Author: karenwky

units/en/unit2/gradio-client.mdx

@@ -25,8 +25,7 @@ Now, we can import the necessary libraries and create a simple Gradio interface
 import gradio as gr
 
 from mcp.client.stdio import StdioServerParameters
-from smolagents import ToolCollection, CodeAgent
-from smolagents import CodeAgent, InferenceClientModel
+from smolagents import InferenceClientModel, CodeAgent, ToolCollection
 from smolagents.mcp_client import MCPClient
 ```