Document auto_archive_duration accepted values

discord/channel.py

@@ -729,6 +729,8 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         auto_archive_duration: :class:`int`
             The duration in minutes before a thread is automatically archived for inactivity.
             If not provided, the channel's default auto archive duration is used.
+
+            Must be one of ``60``, ``1440``, ``4320``, or ``10080``, if provided.
         type: Optional[:class:`ChannelType`]
             The type of thread to create. If a ``message`` is passed then this parameter
             is ignored, as a thread created with a message is always a public thread.
@@ -2548,6 +2550,8 @@ class ForumChannel(discord.abc.GuildChannel, Hashable):
         auto_archive_duration: :class:`int`
             The duration in minutes before a thread is automatically archived for inactivity.
             If not provided, the channel's default auto archive duration is used.
+
+            Must be one of ``60``, ``1440``, ``4320``, or ``10080``, if provided.
         slowmode_delay: Optional[:class:`int`]
             Specifies the slowmode rate limit for user in this channel, in seconds.
             The maximum value possible is ``21600``. By default no slowmode rate limit

discord/message.py

@@ -1215,6 +1215,8 @@ class PartialMessage(Hashable):
         auto_archive_duration: :class:`int`
             The duration in minutes before a thread is automatically archived for inactivity.
             If not provided, the channel's default auto archive duration is used.
+
+            Must be one of ``60``, ``1440``, ``4320``, or ``10080``, if provided.
         slowmode_delay: Optional[:class:`int`]
             Specifies the slowmode rate limit for user in this channel, in seconds.
             The maximum value possible is ``21600``. By default no slowmode rate limit