Update to IRC server information in Appendix A

[Packbat]

In Appendix A: Help and Docs, section A.3, is the following:

You can get help in realtime using IRC (Internet Relay Chat). The IRC-client Konversation is installed by default and preconfigured to join the #suse channel on the Freenode IRC network.

However, according to the IRC page on the openSUSE Wiki, linked in the same section:

Below is a list of well-known, registered openSUSE channels. Traditionally, the Freenode IRC network (on group server address irc.freenode.net) has been used. With operational changes at Freenode, the community has elected to move exclusively to, the Libera network (group server address irc.libera.chat) as of May 2021.

My impression is that changing the current text to say "Libera" instead of "Freenode" would be more than sufficient - the history, while dramatic, is not relevant to new users.