feat: slack

Signed-off-by: Xinwei Xiong(cubxxw) <3293172751nss@gmail.com>

README.md

@@ -8,7 +8,7 @@
 <p align=center>
 <a href="https://goreportcard.com/report/github.com/OpenIMSDK/Open-IM-Server"><img src="https://goreportcard.com/badge/github.com/OpenIMSDK/Open-IM-Server" alt="A+"></a>
 <a href="https://github.com/search?q=user%3Akubesphere+user%3Akubesphere-sigs+label%3A%22good+first+issue%22+state%3Aopen&type=Issues&ref=advsearch&l=&l="><img src="https://img.shields.io/github/issues/badges/shields/good%20first%20issue" alt="good first"></a>
-<a href="https://join.slack.com/t/openimsdk/shared_invite/zt-1tmoj26uf-_FDy3dowVHBiGvLk9e5Xkg"><img src="https://img.shields.io/badge/Slack-600%2B-blueviolet?logo=slack&amp;logoColor=white"></a>
+<a href="https://join.slack.com/t/openimsdk/shared_invite/zt-1tmoj26uf-_FDy3dowVHBiGvLk9e5Xkg"><img src="https://img.shields.io/badge/Slack-10%2B-blueviolet?logo=slack&amp;logoColor=white"></a>
 <a href="https://github.com/OpenIMSDK/Open-IM-Server/blob/main/LICENSE"><img src="https://img.shields.io/badge/license-Apache--2.0-green"></a>
 <a href="https://golang.org/"><img src="https://img.shields.io/badge/Language-Go-blue.svg"></a>
 </p>