gh-134559: Add versionadded for object.__replace__() (#134672)

Author: tmlnv

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::