Release arm-trusted-firmware version 2.8.0+dfsg-1+apertis4

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>

debian/changelog

+arm-trusted-firmware (2.8.0+dfsg-1+apertis4) apertis; urgency=medium
+  
+  * Restore --param=min-pagesize=0 and --no-warn-rwx-segments flags. This
+    change in needed in bookworm based distributions as gcc-10 has been
+    dropped there.
+
+ -- Detlev Casanova <detlev.casanova@gmail.com>  Thu, 18 May 2023 11:58:32 -0400
+
 arm-trusted-firmware (2.8.0+dfsg-1+apertis3) apertis; urgency=medium
 
   * d/rules: Also build bl31 for the rcar platform