Fix option channel types not being detected

Author: Dorukyum

discord/commands/options.py

@@ -163,7 +163,7 @@ def __init__(self, input_type: Any = str, /, description: Optional[str] = None,
                             else:
                                 input_type = (input_type,)
                         for i in input_type:
-                            if isinstance(i, type) and issubclass(i, GuildChannel):
+                            if i is GuildChannel:
                                 continue
                             if isinstance(i, ThreadOption):
                                 self.channel_types.append(i._type)