Release cross-toolchain-base version 66+apertis4

Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

debian/changelog

+cross-toolchain-base (66+apertis4) apertis; urgency=medium
+
+  * Bump linux-source dependency to 6.6.1
+
+ -- Dylan Aïssi <dylan.aissi@collabora.com>  Mon, 20 Nov 2023 14:04:20 +0100
+
 cross-toolchain-base (66+apertis3) apertis; urgency=medium
 
   [ Ritesh Raj Sarraf ]