Doc: fix typo in typing.Type docs (pythonGH-23460)

Author: belm0

Doc/library/typing.rst

@@ -641,7 +641,7 @@ These can be used as types in annotations using ``[]``, each having a unique syn
    :ref:`type variables <generics>`, and unions of any of these types.
    For example::
 
-      def new_non_team_user(user_class: Type[Union[BaseUser, ProUser]]): ...
+      def new_non_team_user(user_class: Type[Union[BasicUser, ProUser]]): ...
 
    ``Type[Any]`` is equivalent to ``Type`` which in turn is equivalent
    to ``type``, which is the root of Python's metaclass hierarchy.