chore: better typehint

Author: Middledot

discord/guild.py

@@ -2934,7 +2934,7 @@ async def ban(
         user: Snowflake,
         *,
         delete_message_seconds: Optional[int] = None,
-        delete_message_days: Optional[int] = None,
+        delete_message_days: Optional[Literal[0, 1, 2, 3, 4, 5, 6, 7]] = None,
         reason: Optional[str] = None,
     ) -> None:
         """|coro|