fix:修复舰R脚本多调用了一次start

src/main/java/com/yutou/qqbot/Controllers/JianRScriptController.java

@@ -30,7 +30,6 @@ public class JianRScriptController {
             }
             manager.setTask(script);
             manager.start();
-            manager.start();
             json.put("code", 0);
             json.put("msg", "任务创建成功");
         }

src/main/java/com/yutou/qqbot/utlis/JianRTaskManager.java

@@ -31,6 +31,9 @@ public class JianRTaskManager {
     }
 
     public void start() {
+        if(running){
+            return;
+        }
         running = true;
         new Thread(new Runnable() {