fix(BaiduGPT): 修复模型设置后未返回问题

- 在设置 Baidu GPT 模型后添加 return 语句，避免继续执行其他逻辑
- 更新应用版本号至 QQBot v.1.7.11.5

src/main/java/com/yutou/qqbot/QQBotApplication.java

@@ -10,7 +10,7 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 
 @SpringBootApplication
 public class QQBotApplication {
-    public static final String version = "QQBot v.1.7.11.4";
+    public static final String version = "QQBot v.1.7.11.5";
 
     public static void main(String[] args) {
         System.out.println("version = " + version);

src/main/java/com/yutou/qqbot/models/Commands/BaiduGPT.java

@@ -87,6 +87,7 @@ public class BaiduGPT extends Model {
                 AbsGPTManager.getManager(gptManager).clear();
                 AbsGPTManager.getManager(gptManager).setModel(text);
                 QQBotManager.getInstance().sendMessage(event.isUser(), qq, list);
+                return;
             }
             if (checkImage()) {
                 parseImage(event, qq);