doc: update IRC references to Libera

docs/CONTRIBUTING.md

@@ -15,7 +15,7 @@ of software solid and usable.
 Patches are preferably to be sent via a Github pull request. If that
 can't be done, patches in "git format-patch" format can be sent
 (eg, posted to fpaste.org with a long enough timeout and a link
-posted to #monero-dev on irc.freenode.net).
+posted to #monero-dev on irc.libera.chat).
 
 Patches should be self contained. A good rule of thumb is to have
 one patch per separate issue, feature, or logical change. Also, no

docs/README.i18n.md

@@ -1,7 +1,7 @@
 Monero daemon internationalization
 ==================================
 
-The Monero command line tools can be translated in various languages. If you wish to contribute and need help/support, contact the [Monero Localization Workgroup on Taiga](https://taiga.getmonero.org/project/erciccione-monero-localization/) or come chat on `#monero-translations` (Freenode/IRC, riot/matrix, MatterMost)
+The Monero command line tools can be translated in various languages. If you wish to contribute and need help/support, contact the [Monero Localization Workgroup on Taiga](https://taiga.getmonero.org/project/erciccione-monero-localization/) or come chat on `#monero-translations` (Libera/IRC, riot/matrix, MatterMost)
 
 In order to use the same translation workflow as the [Monero Core GUI](https://github.com/monero-project/monero-gui), they use Qt Linguist translation files.  However, to avoid the dependencies on Qt this normally implies, they use a custom loader to read those files at runtime.
 

src/cryptonote_core/blockchain.cpp

@@ -967,7 +967,7 @@ start:
     MGINFO("START DUMP");
     MGINFO(ss.str());
     MGINFO("END DUMP");
-    MGINFO("Please send moneromooo on Freenode the contents of this log, from a couple dozen lines before START DUMP to END DUMP");
+    MGINFO("Please send moneromooo on Libera.Chat the contents of this log, from a couple dozen lines before START DUMP to END DUMP");
   }
   return diff;
 }