[3.13] gh-134559: Add versionadded for object.__replace__() (GH-134672) (#134700)

gh-134559: Add versionadded for ``object.__replace__()`` (GH-134672)
(cherry picked from commit 71290a6)

Co-authored-by: tmlnv <108088921+tmlnv@users.noreply.github.com>

Author: miss-islington

Doc/library/copy.rst

@@ -122,6 +122,8 @@ and only supports named tuples created by :func:`~collections.namedtuple`,
    This method should create a new object of the same type,
    replacing fields with values from *changes*.
 
+   .. versionadded:: 3.13
+
 
 .. seealso::