Fix a few typos in the docs

Co-authored-by: o-wo <24418520+o-wo@users.noreply.github.com>

discord/ext/commands/cog.py

@@ -752,7 +752,7 @@ class GroupCog(Cog):
     and :func:`~discord.app_commands.default_permissions` will apply to the group if used on top of the
     cog.
 
-    Hybrid commands will also be added to the Group, giving the ability categorize slash commands into
+    Hybrid commands will also be added to the Group, giving the ability to categorize slash commands into
     groups, while keeping the prefix-style command as a root-level command.
 
     For example:

docs/api.rst

@@ -2669,7 +2669,7 @@ of :class:`enum.Enum`.
 
         .. versionadded:: 2.0
 
-    .. attribute:: automod_role_update
+    .. attribute:: automod_rule_update
 
         An automod rule was updated.