Fixed bugs with RawQuerySet (#2316)

* fix bug

* [pre-commit.ci] auto fixes from pre-commit.com hooks

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

ext/django_stubs_ext/patch.py

@@ -15,7 +15,7 @@
 from django.db.models.fields.related_descriptors import ReverseManyToOneDescriptor
 from django.db.models.lookups import Lookup
 from django.db.models.manager import BaseManager
-from django.db.models.query import QuerySet
+from django.db.models.query import QuerySet, RawQuerySet
 from django.forms.formsets import BaseFormSet
 from django.forms.models import BaseModelForm, BaseModelFormSet, ModelChoiceField
 from django.utils.connection import BaseConnectionHandler
@@ -78,6 +78,7 @@ def __repr__(self) -> str:
     MPGeneric(BaseManager, (3, 1)),
     # These types do have native `__class_getitem__` method since django 4.1:
     MPGeneric(ForeignKey, (4, 1)),
+    MPGeneric(RawQuerySet),
 ]