docs: point to Libera.Chat instead of Freenode

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,7 +7,7 @@ about: Create a report to help us improve
 <!--
 READ THIS FIRST!
 
-If you have a usage question, please ask us on either Stack Overflow (https://stackoverflow.com/questions/tagged/jq) or in the #jq channel (http://irc.lc/freenode/%23jq/) on Freenode (https://webchat.freenode.net/).
+If you have a usage question, please ask us on either Stack Overflow (https://stackoverflow.com/questions/tagged/jq) or in the #jq channel (https://web.libera.chat/#jq) on Libera.Chat (https://libera.chat/).
 
 -->
 

README.md

@@ -72,4 +72,4 @@ cross-compilation environment.  See also
 ["Cross compilation"](https://github.com/stedolan/jq/wiki/Cross-compilation) on
 the wiki.
 
-Send questions to https://stackoverflow.com/questions/tagged/jq or to the #jq channel (http://irc.lc/freenode/%23jq/) on Freenode (https://webchat.freenode.net/).
+Send questions to https://stackoverflow.com/questions/tagged/jq or to the #jq channel (https://web.libera.chat/#jq) on Libera.Chat (https://libera.chat/).

docs/content/index.yml

@@ -29,8 +29,7 @@ tail: |
 
   Ask questions on [stackoverflow](https://stackoverflow.com/) using the [jq
   tag](https://stackoverflow.com/questions/tagged/jq), or on the
-  [#jq](http://irc.lc/freenode/%23jq/) channel on
+  [#jq](https://web.libera.chat/#jq) channel on [Libera.Chat](https://libera.chat/).
-  [Freenode](https://webchat.freenode.net/).
 
 news:
   - date: 1 November 2018