move the item in whats-new.rst into New Features

Author: keewis

doc/whats-new.rst

@@ -76,6 +76,8 @@ New Features
   invoked. (:issue:`3378`, :pull:`3446`, :pull:`3515`)
   By `Deepak Cherian <https://github.com/dcherian>`_ and
   `Guido Imperiale <https://github.com/crusaderky>`_.
+- Add the documented-but-missing :py:meth:`xarray.core.groupby.DatasetGroupBy.quantile`.
+  (:issue:`3525`, :pull:`3527`). By `Justus Magin <https://github.com/keewis>`_.
 
 Bug fixes
 ~~~~~~~~~
@@ -96,8 +98,6 @@ Bug fixes
   (:issue:`3402`). By `Deepak Cherian <https://github.com/dcherian/>`_
 - Allow appending datetime and bool data variables to zarr stores.
   (:issue:`3480`). By `Akihiro Matsukawa <https://github.com/amatsukawa/>`_.
-- Add the documented-but-missing :py:meth:`xarray.core.groupby.DatasetGroupBy.quantile`.
-  (:issue:`3525`, :pull:`3527`). By `Justus Magin <https://github.com/keewis>`_.
 
 Documentation
 ~~~~~~~~~~~~~