Third-party stubs: import from collections.abc where possible (#7637)

stubs/vobject/vobject/base.pyi

@@ -1,6 +1,6 @@
 from _typeshed import SupportsWrite
-from collections.abc import Iterable
-from typing import Any, Iterator, TypeVar, overload
+from collections.abc import Iterable, Iterator
+from typing import Any, TypeVar, overload
 from typing_extensions import Literal
 
 DEBUG: bool