Update README.md

Author: JeffLi1993

README.md

@@ -2,7 +2,7 @@
 
 <div style="text-align: center;margin: 10px;">
 	<a  href="https://mp.weixin.qq.com/s?__biz=MzAxODcyNjEzNQ==&mid=100014539&idx=1&sn=16e0a5dd6abc223a8b72e557e58a0594&chksm=1bd354532ca4dd450447b3e0ecbd3ff2598af225b62fb1f02b360b860778154c5ffdd3e6d341#rd" target="_blank">
-<img src="https://www.bysocket.com/wp-content/uploads/2020/08/long.png" />
+<img src="/JeffLi1993/springboot-learning-example/blob/2df04bc75bdd4d87334c87e323b70f0825bde18e/long.png" />
 </a><br/>
 </div>