gh-86139: Correct NamedTuple and TypedDict's type in typing.rst (#143692)

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Author: aisk

Doc/library/typing.rst

@@ -2369,7 +2369,7 @@ These functions and classes should not be used directly as annotations.
 Their intended purpose is to be building blocks for creating and declaring
 types.
 
-.. class:: NamedTuple
+.. function:: NamedTuple
 
    Typed version of :func:`collections.namedtuple`.
 
@@ -2442,6 +2442,10 @@ types.
       Removed the ``_field_types`` attribute in favor of the more
       standard ``__annotations__`` attribute which has the same information.
 
+   .. versionchanged:: 3.9
+      ``NamedTuple`` is now a function rather than a class.
+      It can still be used as a class base, as described above.
+
    .. versionchanged:: 3.11
       Added support for generic namedtuples.
 
@@ -2585,10 +2589,10 @@ types.
       for more details.
 
 
-.. class:: TypedDict(dict)
+.. function:: TypedDict
 
    Special construct to add type hints to a dictionary.
-   At runtime it is a plain :class:`dict`.
+   At runtime ":class:`!TypedDict` instances" are simply :class:`dicts <dict>`.
 
    ``TypedDict`` declares a dictionary type that expects all of its
    instances to have a certain set of keys, where each key is
@@ -2811,6 +2815,10 @@ types.
 
    .. versionadded:: 3.8
 
+   .. versionchanged:: 3.9
+      ``TypedDict`` is now a function rather than a class.
+      It can still be used as a class base, as described above.
+
    .. versionchanged:: 3.11
       Added support for marking individual keys as :data:`Required` or :data:`NotRequired`.
       See :pep:`655`.