Add reason parameter to Thread.edit

discord/threads.py

@@ -517,6 +517,7 @@ class Thread(Messageable, Hashable):
         pinned: bool = MISSING,
         slowmode_delay: int = MISSING,
         auto_archive_duration: ThreadArchiveDuration = MISSING,
+        reason: Optional[str] = None,
     ) -> Thread:
         """|coro|
 
@@ -548,6 +549,8 @@ class Thread(Messageable, Hashable):
         slowmode_delay: :class:`int`
             Specifies the slowmode rate limit for user in this thread, in seconds.
             A value of ``0`` disables slowmode. The maximum value possible is ``21600``.
+        reason: Optional[:class:`str`]
+            The reason for editing this thread. Shows up on the audit log.
 
         Raises
         -------
@@ -579,7 +582,7 @@ class Thread(Messageable, Hashable):
             flags.pinned = pinned
             payload['flags'] = flags.value
 
-        data = await self._state.http.edit_channel(self.id, **payload)
+        data = await self._state.http.edit_channel(self.id, **payload, reason=reason)
         # The data payload will always be a Thread payload
         return Thread(data=data, state=self._state, guild=self.guild)  # type: ignore