Release apt version 2.2.4+apertis4

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

debian/changelog

+apt (2.2.4+apertis4) apertis; urgency=medium
+
+  * Rework keyring check to support busybox cmp
+
+ -- Walter Lozano <walter.lozano@collabora.com>  Wed, 17 Nov 2021 19:48:58 +0000
+
 apt (2.2.4+apertis3) apertis; urgency=medium
 
   * Move sequoia-gpgv dependency first as that will cause debootstrap to pick it up