Use collections.abc.Iterator in typeannotator to align with PEP 585. (#881)

Author: junkmd

comtypes/tools/codegenerator/typeannotator.py

@@ -1,7 +1,7 @@
 import abc
 import keyword
-from collections.abc import Iterable, Sequence
-from typing import Any, Generic, Iterator, Optional, Protocol, TypeVar
+from collections.abc import Iterable, Iterator, Sequence
+from typing import Any, Generic, Optional, Protocol, TypeVar
 
 from comtypes.tools import typedesc