DOC update link to shuffle_split in older_versions.rst
@@ -760,7 +760,7 @@ Changelog
- Faster mean shift by Conrad Lee
-- New ``Bootstrap``, :ref:`ShuffleSplit` and various other
+- New ``Bootstrap``, :ref:`shuffle_split` and various other
improvements in cross validation schemes by `Olivier Grisel`_ and
`Gael Varoquaux`_
