Update HomePage.md

Author: Snailclimb

docs/HomePage.md

@@ -11,7 +11,7 @@ Java后端技术交流群(限工作一年及以上，架构视频免费领取) 
 <h2 align="center">Special Sponsors</h2>
 <p align="center">
 <a href="https://coding.net/?utm_source=JavaGuide" target="_blank">
-  <img src="https://ws1.sinaimg.cn/large/006rNwoDgy1g2dw5gau7nj30eg02vwfr.jpg"/>
+  <img src="http://pqrlmrv7w.bkt.clouddn.com/img/2019-4/006rNwoDgy1g2dw5gau7nj30eg02vwfr.jpg"/>
  </a>
 </p>