Update README.md

Author: Tellsea

springboot-websocket/README.md

@@ -326,4 +326,3 @@ public class WebSocketController {
 ```
 ## 效果图
 ![在这里插入图片描述](https://img-blog.csdnimg.cn/20190419190241179.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzYyMjM3,size_16,color_FFFFFF,t_70)
->特别感谢：https://blog.csdn.net/qq_38455201/article/details/80374712