Fix a few more type errors

discord/integrations.py

@@ -215,6 +215,7 @@ class StreamIntegration(Integration):
     @property
     def role(self) -> Optional[Role]:
         """Optional[:class:`Role`] The role which the integration uses for subscribers."""
+        # The key is `int` but `int | None` will return `None` anyway.
         return self.guild.get_role(self._role_id)  # type: ignore
 
     async def edit(