Fix broken ref + tweak whatsnew.

Author: pp-mo

docs/src/further_topics/dataless_cubes.rst

@@ -53,7 +53,8 @@ This is equivalent to ``cube2 = cube.copy(); cube2.data = None``.
 Save and Load
 -------------
 The netcdf file interface can save and re-load dataless cubes correctly.
-See : :ref:`netcdf_dataless`.
+TODO: link to ref e.g. "netcdf_dataless" in netcdf docs,
+when #6339 "Dataless netcdf save+load" is in place.
 
 
 .. _dataless_merge:

docs/src/whatsnew/latest.rst

@@ -42,12 +42,9 @@ This document explains the changes made to Iris for this release
 
 #. `@pp-mo`_ added the ability to merge dataless cubes.  This also means they can be
    re-loaded normally with :meth:`iris.load`.  See: :ref:`dataless_merge`.
+   Also added a new documentation section on dataless cubes.
    (:issue:`5770`, :pull:`6581`)
 
-#. `@pp-mo`_ added a documentation section on dataless cubes.
-   See: :ref:`dataless-cubes`.
-   (:issue:`XXX`, :pull:`XXX`)
-
 
 🐛 Bugs Fixed
 =============