[master] dd3157c6a whats-new: Clarify what the TODO is about

[Dridi Boukelmoune]

commit dd3157c6ae9b952e4f253c983ad182125f27cb5b
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Fri Sep 3 11:17:58 2021 +0200

    whats-new: Clarify what the TODO is about

diff --git a/doc/sphinx/whats-new/changes-trunk.rst b/doc/sphinx/whats-new/changes-trunk.rst
index dda4957ab..591001b86 100644
--- a/doc/sphinx/whats-new/changes-trunk.rst
+++ b/doc/sphinx/whats-new/changes-trunk.rst
@@ -31,8 +31,8 @@ regular expressions are used, like VCL, ban expressions, VSL queries etc.
 
 There were some parameters changes, see the upgrade notes for more details.
 
-Structured Fields
-=================
+Structured Fields numbers
+=========================
 
 TODO (probably deserves its own section too)