fix: filter out Nones from guild.role before sorting (#1457)

Co-authored-by: Astrea49 <25420078+Astrea49@users.noreply.github.com>

Author: AstreaTSS

interactions/models/discord/guild.py

@@ -369,8 +369,7 @@ def humans(self) -> List["models.Member"]:
     @property
     def roles(self) -> List["models.Role"]:
         """Returns a list of roles associated with this guild."""
-        roles = sorted((self._client.cache.get_role(r_id) for r_id in self._role_ids), reverse=True)
-        return [r for r in roles if r]
+        return sorted((r for r_id in self._role_ids if (r := self._client.cache.get_role(r_id))), reverse=True)
 
     @property
     def me(self) -> "models.Member":