Update Group.md

Author: CyC2018

other/Group.md

@@ -1,7 +1,7 @@
 </br> 
 <div align="center">
-  <img src="https://github.com/CyC2018/CS-Notes/raw/master/other/group1.png" width="300px">
+  <img src="https://github.com/CyC2018/CS-Notes/raw/master/other/group1.png" width="300px"></br>
   <a target="_blank" href="//shang.qq.com/wpa/qunwpa?idkey=93df4b54d965e6c649fe49fe109b2d656609aacc5ec49b4ef4071ae6db1d43c0">QQ 群</a>
-</div> </br>
+</div>