Merge branch 'goto-libera' into 'master'

docs/index: Change reference of freenode to libera.chat

See merge request !6

docs/index.md

@@ -7,7 +7,7 @@
 * [Pleroma-FE configuration and customization for instance administrators](frontend/CONFIGURATION.md)
 
 ## Community Channels
-* IRC: **#pleroma** and **#pleroma-dev** on freenode, webchat is available at <https://irc.pleroma.social>
-* Matrix: <https://matrix.to/#/#freenode_#pleroma:matrix.org>
+* IRC: **#pleroma** and **#pleroma-dev** on libera.chat, webchat is available at <https://irc.pleroma.social>
+* Matrix: [#pleroma:libera.chat](https://matrix.to/#/#pleroma:libera.chat) and [#pleroma-dev:libera.chat](https://matrix.to/#/#pleroma-dev:libera.chat)
 * Code: <https://git.pleroma.social/pleroma/>