Update support section of readme (resolves #2753)

Author: YoshiRulz

README.md

@@ -338,8 +338,8 @@ Please don't bother core devs about these WIPs unless you're looking to contribu
 ## Support and troubleshooting
 
 A short [FAQ](http://tasvideos.org/Bizhawk/FAQ.html) is provided on the [BizHawk wiki](http://tasvideos.org/Bizhawk.html). If your problem is one of the many not answered there, and you can't find it in the [issue tracker search](https://github.com/TASVideos/BizHawk/issues?q=is%3Aissue+PUT_ISSUE_KEYWORDS_HERE), you can try:
-* `#bizhawk` on freenode IRC ([via web browser](https://webchat.freenode.net/#bizhawk); via HexChat/Irssi: `chat.freenode.net:6697`; [via Matrix](https://matrix.to/#/#freenode_#bizhawk:matrix.org))
 * `#emulation` on [the TASVideos Discord](https://discordapp.com/invite/GySG2b6) (also the more specialised channels `#tas-production` and `#scripting`, and [the ApiHawk server](https://discord.gg/UPhN4um3px))
+* `#bizhawk` on Libera Chat ([via Matrix](https://matrix.to/#/#bizhawk:libera.chat) or [via IRC](https://libera.chat/guides/connect))
 * The TASVideos [forum for BizHawk](http://tasvideos.org/forum/viewforum.php?f=64)
 
 You can [open a new issue](https://github.com/TASVideos/BizHawk/issues/new) at any time if you're logged in to GitHub. Please **at the very least read the issue templates**, we tend to ask the same questions for every one-line issue that's opened.