[6.6] 0f1a08a10 Point -trunk to 6.6 in whats-new/index.rst

[Martin Blix Grydeland]

commit 0f1a08a10a17714933746be536f4741f450ee734
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Mon Mar 15 14:55:20 2021 +0100

    Point -trunk to 6.6 in whats-new/index.rst

diff --git a/doc/sphinx/whats-new/index.rst b/doc/sphinx/whats-new/index.rst
index 5845a4890..37ad90d28 100644
--- a/doc/sphinx/whats-new/index.rst
+++ b/doc/sphinx/whats-new/index.rst
@@ -13,18 +13,14 @@ This section describes the changes and improvements between different
 versions of Varnish, and what upgrading between the different versions
 entail.
 
-Varnish **$NEXT_RELEASE**
--------------------------
-
-**Note: These are working documents for a future release, with running
-updates for changes in the development branch. For changes in the
-released versions of Varnish, see the chapters listed below.**
+Varnish 6.6
+-----------
 
 .. toctree::
    :maxdepth: 2
 
-   changes-trunk
-   upgrading-trunk
+   changes-6.6
+   upgrading-6.6
 
 Varnish 6.5
 -----------