configs-base: use correct kernel headers version

Signed-off-by: Christian Stewart <christian@aperture.us>

Author: paralin

configs-base/pre/buildroot/kernel

@@ -11,7 +11,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.13.3"
 
 # latest possible linux headers version
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_13=y
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
 
 BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
 BR2_KERNEL_HEADERS_AS_KERNEL=y