fix typing

Author: provinzkraut

litestar_django/dto.py

@@ -193,7 +193,7 @@ def get_field_default(
         return default, default_factory
 
     @classmethod
-    def get_model_fields(cls, model_type: type[T]) -> Generator[tuple[str, AnyField]]:
+    def get_model_fields(cls, model_type: type[T]) -> Generator[tuple[str, AnyField], None, None]:
         for field in model_type._meta.get_fields():
             yield field.name, field
             if isinstance(field, ForeignKey):