Whatsnew minor fix (#4829)

* Update latest.rst

* PR link

* add issue link

docs/src/whatsnew/latest.rst

@@ -119,10 +119,10 @@ This document explains the changes made to Iris for this release
 #. `@wjbenfold`_ and `@rcomer`_ (reviewer) corrected the axis on which masking
    is applied when an aggregator adds a trailing dimension. (:pull:`4755`)
 
-*  `@rcomer`_ and  `@pp-mo`_  ensured that all methods to create or modify a
+#. `@rcomer`_ and  `@pp-mo`_  ensured that all methods to create or modify a
    :class:`iris.cube.CubeList` check that it only contains cubes.  According to
    code comments, this was supposedly already the case, but there were several bugs
-   and loopholes.
+   and loopholes. (:issue:`1897`, :pull:`4767`)
 
 
 💣 Incompatible Changes