docs: fix SendMessageSuccessResponse import in example

Author: Areo-Joe

README.md

@@ -113,8 +113,8 @@ The `A2AClient` makes it easy to communicate with any A2A-compliant agent.
 
 ```typescript
 // client.ts
-import { A2AClient, SendMessageSuccessResponse } from "@a2a-js/sdk/client";
-import { Message, MessageSendParams } from "@a2a-js/sdk";
+import { A2AClient } from "@a2a-js/sdk/client";
+import { Message, MessageSendParams, SendMessageSuccessResponse } from "@a2a-js/sdk";
 import { v4 as uuidv4 } from "uuid";
 
 async function run() {