[commands] Add missing async in documentation

discord/ext/commands/core.py

@@ -1318,7 +1318,7 @@ def check(predicate):
 
         def owner_or_permissions(**perms):
             original = commands.has_permissions(**perms).predicate
-            def extended_check(ctx):
+            async def extended_check(ctx):
                 if ctx.guild is None:
                     return False
                 return ctx.guild.owner_id == ctx.author.id or await original(ctx)