Update IRC links to point to Godot Contributors Chat (#5550)

Co-authored-by: Hugo Locurcio <[email protected]>

community/contributing/pr_workflow.rst

@@ -364,7 +364,8 @@ On that line, there is a "Pull request" link. Clicking it will open a form
 that will let you issue a pull request on the ``godotengine/godot`` upstream
 repository. It should show you your two commits, and state "Able to merge".
 If not (e.g. it has way more commits, or says there are merge conflicts),
-don't create the PR, something went wrong. Go to IRC and ask for support :)
+don't create the PR, something went wrong. Go to the 
+`Godot Contributors Chat <https://chat.godotengine.org/>`_ and ask for support :)
 
 Use an explicit title for the PR and put the necessary details in the comment
 area. You can drag and drop screenshots, GIFs or zipped projects if relevant,

community/contributing/updating_the_class_reference.rst

@@ -119,7 +119,7 @@ Another option is to delete the branch you're working on, synchronize the master
     git pull --rebase upstream master
     git checkout -b your-new-branch-name
 
-If you're feeling lost by now, come to our `IRC channels <https://webchat.freenode.net/?channels=#godotengine>`_ and ask for help. Experienced Git users will give you a hand.
+If you're feeling lost by now, come to our `Godot Contributors Chat <https://chat.godotengine.org/>`_ and ask for help. Experienced Git users will give you a hand.
 
 Updating the documentation template
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -310,7 +310,7 @@ I don't know what this method does!
 
 No problem. Leave it behind, and list the methods you skipped when you request a pull of your changes. Another writer will take care of it.
 
-You can still have a look at the methods' implementation in Godot's source code on GitHub. Also, if you have doubts, feel free to ask on the `Q&A website <https://godotengine.org/qa/>`__ and on IRC (freenode, #godotengine).
+You can still have a look at the methods' implementation in Godot's source code on GitHub. Also, if you have doubts, feel free to ask on the `Q&A website <https://godotengine.org/qa/>`__ and on the `Godot Contributors Chat <https://chat.godotengine.org/>`__.
 
 
 Localization