doc: Switch to new IRC channel

See pytest-dev/pytest#8722

Author: The-Compiler

docs/contributing.rst

@@ -15,8 +15,11 @@ Community
 The fastest way to get feedback on contributions/bugs is usually to open an
 issue in the `issue tracker`_.
 
-Discussions also happen via IRC in #pylib on irc.freenode.org. You may also
-be interested in following `@andreaspelme`_ on Twitter.
+Discussions also happen via IRC in #pytest `on irc.libera.chat
+<ircs://irc.libera.chat:6697/#pytest>`_ (join using an IRC client, `via webchat
+<https://web.libera.chat/#pytest>`_, or `via Matrix
+<https://matrix.to/#/%23pytest:libera.chat>`_).
+You may also be interested in following `@andreaspelme`_ on Twitter.
 
 *************
 In a nutshell

docs/faq.rst

@@ -149,7 +149,10 @@ If you think you've found a bug or something that is wrong in the
 documentation, feel free to `open an issue on the GitHub project`_ for
 pytest-django.
 
-Direct help can be found in the #pylib IRC channel on irc.freenode.org.
+Direct help can be found in the #pytest IRC channel `on irc.libera.chat
+<ircs://irc.libera.chat:6697/#pytest>`_ (using an IRC client, `via webchat
+<https://web.libera.chat/#pytest>`_, or `via Matrix
+<https://matrix.to/#/%23pytest:libera.chat>`_).
 
 .. _pytest tag: https://stackoverflow.com/search?q=pytest
 .. _open an issue on the GitHub project: