Update chat badge in README

Author: Xiretza

README.md

@@ -7,7 +7,7 @@ The EteSync Web App - Use EteSync from the browser!
 
 
 ![GitHub tag](https://img.shields.io/github/tag/etesync/etesync-web.svg)
-[![Chat on freenode](https://img.shields.io/badge/irc.freenode.net-%23EteSync-blue.svg)](https://webchat.freenode.net/?channels=#etesync)
+[![Chat with us](https://img.shields.io/badge/chat-IRC%20|%20Matrix%20|%20Web-blue.svg)](https://www.etebase.com/community-chat/)
 
 For notes, please refer to [the EteSync Notes](https://github.com/etesync/etesync-notes/) repository.