doc: README.md

README.md

@@ -14,7 +14,7 @@
 <img src="https://img.shields.io/badge/language-kotlin-orange.svg"/>
 <img src="https://img.shields.io/badge/license-Apache-blue"/>
 <a href="https://liangjingkanji.github.io/Net/api/"><img src="https://img.shields.io/badge/api-%E5%87%BD%E6%95%B0%E6%96%87%E6%A1%A3-red"/></a>
-<a href="https://jq.qq.com/?_wv=1027&k=vWsXSNBJ"><img src="https://img.shields.io/badge/QQ群-752854893-blue"/></a>
+<img src="https://raw.githubusercontent.com/liangjingkanji/liangjingkanji/master/img/group.svg"/>
 <a href="http://liangjingkanji.github.io/Net/updates"><img src="https://img.shields.io/badge/updates-%E6%9B%B4%E6%96%B0%E6%97%A5%E5%BF%97-brightgreen"/></a>
 <a href="https://github.com/liangjingkanji/Net/blob/master/docs/issues.md"><img src="https://raw.githubusercontent.com/liangjingkanji/Net/master/docs/img/issues.svg"/></a>
 </p>