add author name to list

docs/src/whatsnew/latest.rst

@@ -105,6 +105,7 @@ This document explains the changes made to Iris for this release
     Whatsnew author names (@github name) in alphabetical order. Note that,
     core dev names are automatically included by the common_links.inc:
 
+.. _@fnattino: https://github.com/fnattino
 .. _@jrackham-mo: https://github.com/jrackham-mo