update old freenode channel link to libera

Author: t7ru

CONTRIBUTING.md

@@ -350,7 +350,7 @@ Issues are labelled to make them easier to categorise and find by:
 ## Communication
 
 Selenium contributors frequent the `#selenium` channel on
-[`irc.freenode.org`](https://webchat.freenode.net/). You can also join
+[`libera.chat`](https://web.libera.chat/). You can also join
 the [`selenium-developers@` mailing list](https://groups.google.com/forum/#!forum/selenium-developers).
 Check https://selenium.dev/support/ for a complete list of options to communicate.
 

javascript/selenium-webdriver/README.md

@@ -116,7 +116,7 @@ script provided with `selenium-webdriver`.
 API documentation is available online from the [Selenium project][api].
 Additional resources include
 
-- the #selenium channel on freenode IRC
+- the #selenium channel on Libera IRC
 - the [[email protected]][users] list
 - [SeleniumHQ](https://selenium.dev/documentation/) documentation