update readme

Author: NJHu

README.md

@@ -1,5 +1,5 @@
 <div>
-<img src="./images/qun.jpg" width="18%"><img width="25%"><img src="./images/nj.jpg" width="18%"><b>Github&nbsp点个赞↑👍,感谢您的支持!</b>
+<img src="./images/qun.jpg" width="14%"><img width="25%"><img src="./images/nj.jpg" width="14%"><b>Github&nbsp点个赞↑👍,感谢您的支持!</b>
 </div>
 
 GitHub：[NJHu](https://github.com/njhu) ｜ Blog：[NJHu 微博(Chinese)](https://www.weibo.com/njhu) ｜ [feedback](mailto:64hp@163.com):64hp@163.com