Merge branch 'libera_chat' into 'master'

docs/sane.man: Move to libera.chat

See merge request sane-project/backends!637

doc/sane.man

@@ -102,7 +102,7 @@ unsubscribe:
 .TP
 .B SANE IRC channel
 The IRC (Internet Relay Chat) channel #sane can be found on the Freenode
-network (irc.freenode.net). It's for discussing
+network (irc.libera.chat). It's for discussing
 .B SANE
 problems, talking about development and general
 .B SANE