Update NEWS entries.

Author: serhiy-storchaka

Misc/NEWS.d/next/C API/2023-12-01-11-27-41.gh-issue-104231.yXgoYF.rst

@@ -0,0 +1,7 @@
+:c:func:`PyObject_Str`, :c:func:`PyObject_Repr` and :c:func:`PyObject_ASCII`
+now always return an instance of :class:`str`, even if the special methods
+``__str__()`` or ``__repr__()`` return an instance of a subclass of
+:class:`!str`.
+:c:func:`PyObject_Bytes` now always returns an instance of :class:`bytes`, even
+if the special method ``__bytes__()`` returns an instance of a subclass of
+:class:`!bytes`.

Misc/NEWS.d/next/C_API/2023-12-01-11-27-41.gh-issue-104231.yXgoYF.rst

@@ -0,0 +1,6 @@
+:func:`str`, :func:`repr` and :func:`ascii` now always return an instance
+of :class:`str`, even if the special methods ``__str__()`` or ``__repr__()``
+return an instance of a subclass of :class:`!str`.
+:func:`bytes` now always returns an instance of :class:`bytes`, even
+if the special method ``__bytes__()`` returns an instance of a subclass of
+:class:`!bytes`.