fix: fix the missing .build() (#267)

Author: lokidundun

docs/quick-start.md

@@ -419,7 +419,8 @@ import com.alibaba.cloud.ai.graph.agent.hook.hip.HumanInTheLoopHook;
 // 创建 hook
 Hook humanInTheLoopHook = HumanInTheLoopHook.builder()
  .approvalOn("getWeatherTool", ToolConfig.builder().description("Please confirm tool execution.")
- .build();
+    .build())
+ .build();       
 
 ReactAgent agent = ReactAgent.builder()
     .name("my_agent")