Apply suggestions from code review

Author: sobolevn

tests/typecheck/models/test_inheritance.yml

@@ -122,7 +122,7 @@
             content: |
                 from django.db.models import Model
                 from django.db.models.manager import Manager
-                from typing import TypeVar, Generic, ClassVar
+                from typing import TypeVar, Generic, ClassVar, Type
                 from typing_extensions import Self
 
                 M = TypeVar("M", bound=Model, covariant=True)
@@ -138,7 +138,7 @@
 
                 class ResultProcessorBase(Generic[T]):
                     @property
-                    def model_cls(self) -> type[T]:
+                    def model_cls(self) -> Type[T]:
                         raise NotImplementedError
 
                     def f(self) -> T: