docs: update for 11.4.0 (discordjs#2727)

* Update for 11.4.0 docs

Author: Kolkies

docs/general/updating.md

@@ -1,3 +1,7 @@
+# Version 11.4.0
+v11.4.0 backports many new features such as Rich Presence and bugfixes from v11.3.0.
+See [the changelog](https://github.com/discordjs/discord.js/releases/tag/11.4.0) for a full list of changes, including information about deprecations.
+
 # Version 11.3.0
 v11.3.0 backports many new features and bug fixes from the in-development v12.
 See [the changelog](https://github.com/discordjs/discord.js/releases/tag/11.3.0) for a full list of changes, including information about deprecations.

docs/general/welcome.md

@@ -18,8 +18,8 @@
 </div>
 
 # Welcome!
-Welcome to the discord.js v11.3 documentation.
-The v11.3 release contains backports of many features and bug fixes from the in-development v12, such as categories and animated emoji support.
+Welcome to the discord.js v11.4 documentation.
+The v11.4 release contains bugfixes from v11.3 and backports features such as Rich Presence.
 
 v12 is still very much a work-in-progress, as we're aiming to make it the best it can possibly be before releasing.
 If you are fond of living life on the bleeding-edge, check out the master branch.