[BUG] MultiAgentSupervisorExample 文件 工具调用bug修改

### Is there an existing issue for this? - [x] I have searched the existing issues ### Current Behavior this.chatClient = ChatClient.builder(model) .defaultTools(coderTool) .build(); ### Expected Behavior this.chatClient = ChatClient.builder(model) .defaultToolCallbacks(searchTool) .build(); ### Steps To Reproduce _No response_ ### Environment ```markdown Spring AI Alibaba version(s): ``` ### Debug logs _No response_ ### Anything else? _No response_