Update _index.md

_index.md

@@ -33,7 +33,7 @@ Spare me the details just give me the links to the docs!
 
 ### Community
   - [IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat): [`freenode.net#card10badge`](ircs://chat.freenode.net:6697/card10badge)
-  - mirrored to [Matrix](https://en.wikipedia.org/wiki/Matrix_(protocol)) (mirror): [`#card10badge:asra.gr`](https://matrix.to/#/#card10badge:asra.gr)
+  - mirrored to [Matrix](https://en.wikipedia.org/wiki/Matrix_(protocol)) (mirror): [`#freenode_#card10badge:matrix.org`](https://matrix.to/#/#freenode_#card10badge:matrix.org)
     - If you can please join via IRC directly. Bridging IRC channels to Matrix is unreliable at best.
   - [GitLab: `https://git.card10.badge.events.ccc.de`](https://git.card10.badge.events.ccc.de/explore/groups/)