Merge pull request #33 from konnectors/update_irc_link

doc: Update outdated IRC link

README.md

@@ -53,7 +53,7 @@ The lead maintainers for this konnector is <YOUR NAME>
 You can reach the Cozy Community by:
 
 - [Konnectors tutorial](https://docs.cozy.io/en/tutorials/konnector/)
-- Chatting with us on IRC [#cozycloud on Freenode][freenode]
+- Chatting with us on IRC [#cozycloud on Libera.Chat][libera]
 - Posting on our [Forum]
 - Posting issues on the [Github repos][github]
 - Say Hi! on [Twitter]
@@ -66,7 +66,7 @@ License
 
 [cozy]: https://cozy.io "Cozy Cloud"
 [agpl-3.0]: https://www.gnu.org/licenses/agpl-3.0.html
-[freenode]: http://webchat.freenode.net/?randomnick=1&channels=%23cozycloud&uio=d4
+[libera]: https://web.libera.chat/#cozycloud
 [forum]: https://forum.cozy.io/
 [github]: https://github.com/cozy/
 [nodejs]: https://nodejs.org/