fix(channel): correct deprecated decorator arguments in CategoryChannel

Author: Lumabots

discord/channel.py

@@ -3067,7 +3067,7 @@ async def create_forum_channel(self, name: str, **options: Any) -> ForumChannel:
         """
         return await self.guild.create_forum_channel(name, category=self, **options)
 
-    @utils.deprecated(since=2.7, removed=3.0)
+    @utils.deprecated(since="2.7", removed="3.0")
     def is_nsfw(self) -> bool:
         return False