🐛 Remove 3.9 type syntax

bbs/api/queries/users.py

@@ -1,3 +1,5 @@
+from typing import List
+
 import strawberry
 import strawberry_django
 from django.contrib.auth.models import User as DjangoUser
@@ -8,7 +10,7 @@ from bbs.api.types.users import User
 
 @strawberry.type
 class UsersQueries:
-    all_users: list[User] = strawberry_django.field()
+    all_users: List[User] = strawberry_django.field()
 
     @strawberry.field
     def user(self, user_id: ID) -> User: