[7.3] 0e75bd8ee changes.rst: Add new heading

[Dridi Boukelmoune]

commit 0e75bd8ee18c4f042f14e357c38827979cc59d04
Author: Dag Haavi Finstad <daghf at varnish-software.com>
Date:   Tue Nov 7 10:39:19 2023 +0100

    changes.rst: Add new heading

diff --git a/doc/changes.rst b/doc/changes.rst
index 08e53512e..3f6397a8d 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -30,6 +30,10 @@ directory, also available in HTML format at
 http://varnish-cache.org/docs/trunk/whats-new/index.html and via
 individual releases. These documents are updated as part of the
 release process.
+================================
+Varnish Cache 7.3.1 (2023-11-13)
+================================
+
 
 ================================
 Varnish Cache 7.3.0 (2023-03-15)