[3.13] gh-101860: document property.__name__ (GH-123399) (#123428)

(cherry picked from commit 40fff90)

Co-authored-by: Bénédikt Tran <[email protected]>

Author: miss-islington

Doc/library/functions.rst

@@ -1693,6 +1693,13 @@ are always available.  They are listed here in alphabetical order.
    .. versionchanged:: 3.5
       The docstrings of property objects are now writeable.
 
+   .. attribute:: __name__
+
+      Attribute holding the name of the property. The name of the property
+      can be changed at runtime.
+
+      .. versionadded:: 3.13
+
 
 .. _func-range:
 .. class:: range(stop)

Doc/whatsnew/3.13.rst

@@ -607,6 +607,9 @@ Other Language Changes
   the :mod:`bz2`, :mod:`lzma`, :mod:`tarfile`, and :mod:`zipfile` modules.
   (Contributed by Serhiy Storchaka in :gh:`115961`.)
 
+* Add a :attr:`~property.__name__` attribute on :class:`property` objects.
+  (Contributed by Eugene Toder in :gh:`101860`.)
+
 
 New Modules
 ===========