Readd PartialMessageable to possible Message.channel types

discord/message.py

@@ -1331,7 +1331,7 @@ class Message(PartialMessage, Hashable):
         This is not stored long term within Discord's servers and is only used ephemerally.
     embeds: List[:class:`Embed`]
         A list of embeds the message has.
-    channel: Union[:class:`TextChannel`, :class:`StageChannel`, :class:`VoiceChannel`, :class:`Thread`, :class:`DMChannel`, :class:`GroupChannel`]
+    channel: Union[:class:`TextChannel`, :class:`StageChannel`, :class:`VoiceChannel`, :class:`Thread`, :class:`DMChannel`, :class:`GroupChannel`, :class:`PartialMessageable`]
         The :class:`TextChannel` or :class:`Thread` that the message was sent from.
         Could be a :class:`DMChannel` or :class:`GroupChannel` if it's a private message.
     call: Optional[:class:`CallMessage`]