Update README.md

Author: silently9527

README.md

@@ -4,7 +4,7 @@
 
 <p align="center">
   <a href="#微信公众号"><img src="https://img.shields.io/badge/公众号-贝塔学JAVA-blue.svg" alt="公众号"></a>
-  <a href="https://juejin.cn/user/2779199782521693"><img src="https://img.shields.io/badge/juejin-掘金-blue.svg" alt="掘金"></a>
+  <a href="https://juejin.cn/user/2779199782521693"><img src="https://img.shields.io/badge/juejin-掘金-yellow.svg" alt="掘金"></a>
   <a href="https://blog.csdn.net/asdewq380303318"><img src="https://img.shields.io/badge/csdn-CSDN-red.svg" alt="CSDN"></a>
   <a href="https://my.oschina.net/u/3230120"><img src="https://img.shields.io/badge/oschina-开源中国-green" alt="开源中国"></a>
   <a href="https://www.zhihu.com/people/huaan9527-57/posts"><img src="https://img.shields.io/badge/zhihu-知乎-purple" alt="知乎"></a>