Fix release note details link for 7.4.0

R1/source/releases/rel7.4.0.rst

@@ -14,7 +14,7 @@ More information:
 
 * List of most important `Changes in 7.4 <https://varnish-cache.org/docs/7.4/whats-new/changes-7.4.html>`_
 * Help on `Upgrading to Varnish 7.4 <https://varnish-cache.org/docs/7.4/whats-new/upgrading-7.4.html>`_
-* `Full changes.rst entry for 7.4.0 <https://github.com/varnishcache/varnish-cache/blob/7.4/doc/changes.rst#varnish-cache-730-2023-03-15>`_
+* `Full changes.rst entry for 7.4.0 <https://github.com/varnishcache/varnish-cache/blob/7.4/doc/changes.rst#varnish-cache-740-2023-09-15>`_
 
 For installation instructions including information about cloud images see
 `the Varnish Installation Manual </docs/trunk/installation/index.html>`_