README: Add matrix space

Matrix.org stopped bridging Libera channels a while ago, so this was
created instead.

README.md

@@ -18,7 +18,10 @@ KMonad is an advanced tool that lets you infinitely customize and extend the fun
 
 If you want to get started with the latest, stable binary release, please check out the master branch, if you are interested in the latest additions and tweaks, switch on over to develop and compile your own binary.
 
-Additionally, if you need any help or just want to say hi, you can join our [Discord server](https://discord.gg/3tFfWmnahN) or jump into our [IRC channel](https://web.libera.chat/#kmonad) (`#[email protected]`), which is also bridged with matrix (`#kmonad:libera.chat`).
+Additionally, if you need any help or just want to say hi,
+you can join our [Matrix space](https://matrix.to/#/#Kmonad:matrix.org) or
+jump into our [IRC channel](https://web.libera.chat/#kmonad).
+There is also an unofficial [Discord server](https://discord.gg/3tFfWmnahN).
 
 ## Features