[6.6] 35670e8f8 Rename and relable changes-trunk.rst to changes-6.6.rst

[Martin Blix Grydeland]

commit 35670e8f819e919ea8bdb40a319ad58268e8e355
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Mon Mar 15 14:47:43 2021 +0100

    Rename and relable changes-trunk.rst to changes-6.6.rst

diff --git a/doc/sphinx/whats-new/changes-trunk.rst b/doc/sphinx/whats-new/changes-6.6.rst
similarity index 100%
rename from doc/sphinx/whats-new/changes-trunk.rst
rename to doc/sphinx/whats-new/changes-6.6.rst