fix(ChatController): 将异常提示从中文改为英文

src/main/java/com/yolo/keyborad/controller/ChatController.java

@@ -97,7 +97,7 @@ public class ChatController {
         return Flux.defer(() -> chatService.talk(chatReq))
                 .onErrorResume(e -> {
                     log.error("聊天流式接口异常", e);
-                    String message = StrUtil.isBlank(e.getMessage()) ? "服务暂时不可用，请稍后重试" : e.getMessage();
+                    String message = StrUtil.isBlank(e.getMessage()) ? "service down，please wait a moment" : e.getMessage();
                     return Flux.just(
                             ServerSentEvent.builder(new ChatStreamMessage("error", message))
                                     .event("error")