Merge pull request #2177 from openimsdk/cubxxw-patch-2

update release-v3.1  images

README.md

@@ -8,7 +8,6 @@
     ⭐️  Open source Instant Messaging Server ⭐️ <br>
 <h3>
 
-
 <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/OpenIMSDK/Open-IM-Server/issues?q=is%3Aissue+is%3Aopen+sort%3Aupdated-desc+label%3A%22good+first+issue%22"><img src="https://img.shields.io/github/issues/OpenIMSDK/Open-IM-Server/good%20first%20issue?logo=%22github%22" alt="good first"></a>