Added docs for overwrites kwarg for CategoryChannel.edit

discord/channel.py

@@ -772,6 +772,11 @@ class CategoryChannel(discord.abc.GuildChannel, Hashable):
             To mark the category as NSFW or not.
         reason: Optional[:class:`str`]
             The reason for editing this category. Shows up on the audit log.
+        overwrites: :class:`dict`
+            A :class:`dict` of target (either a role or a member) to
+            :class:`PermissionOverwrite` to apply to the channel.
+            
+            .. versionadded:: 1.3.0
 
         Raises
         ------