Bump linux-source dependency to 6.12.3

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

debian/control

@@ -11,7 +11,7 @@ Build-Depends: binutils-multiarch,
   binutils-source (>= 2.40-2~),
   glibc-source (>= 2.36-8~),
   gcc-12-source (>= 12.2.0-14~),
-  linux-source-6.11 (>= 6.11.2), linux-libc-dev (>= 6.11.2),
+  linux-source-6.12 (>= 6.12.3), linux-libc-dev (>= 6.12.3),
   autoconf (>= 2.69), autoconf2.69, autogen,
   automake, bison (>= 1:2.3), chrpath, debhelper-compat (= 13),
   dpkg-dev (>= 1.15.3.1), fakeroot, file, flex,

debian/rules

@@ -61,7 +61,7 @@ CROSS_GNU_TYPE   = $(call _gnu_type,${CROSS_ARCH})
 CROSS_PKG_GNU_TYPE = $(subst _,-,$(call _gnu_type,${CROSS_ARCH}))
 
 MIN_VER_GLIBC		:= 2.36-8~
-MIN_VER_LINUX		:= 6.11.2
+MIN_VER_LINUX		:= 6.12.3
 MIN_VER_GCC		:= 12.2.0-14~
 MIN_VER_BINUTILS	:= 2.40-2~
 VER_GCC_BASE		:= 12