Big diff: use lower-case list and dict (#5888)

stdlib/copyreg.pyi

@@ -1,9 +1,9 @@
-from typing import Any, Callable, Hashable, List, Optional, SupportsInt, Tuple, TypeVar, Union
+from typing import Any, Callable, Hashable, Optional, SupportsInt, Tuple, TypeVar, Union
 
 _TypeT = TypeVar("_TypeT", bound=type)
 _Reduce = Union[Tuple[Callable[..., _TypeT], Tuple[Any, ...]], Tuple[Callable[..., _TypeT], Tuple[Any, ...], Optional[Any]]]
 
-__all__: List[str]
+__all__: list[str]
 
 def pickle(
     ob_type: _TypeT,