[isar-cip-core][PATCH] doc: Update link to unified kernel image spec

Jan Kiszka

From: Jan Kiszka <jan.kiszka@...>

Closes: https://gitlab.com/cip-project/cip-core/isar-cip-core/-/issues/53
Signed-off-by: Jan Kiszka <jan.kiszka@...>
doc/README.secureboot.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/README.secureboot.md b/doc/README.secureboot.md
index 8c218d25..7dff37d3 100644
--- a/doc/README.secureboot.md
+++ b/doc/README.secureboot.md
@@ -6,7 +6,7 @@ This document describes how to generate a secure boot capable image with
## Description

The image build signs the EFI Boot Guard bootloader (bootx64.efi) and generates
-a signed [unified kernel image](https://systemd.io/BOOT_LOADER_SPECIFICATION/).
+a signed [unified kernel image](https://uapi-group.org/specifications/specs/unified_kernel_image).
A unified kernel image packs the kernel, initramfs and the kernel command-line
in one binary object. As the kernel command-line is immutable after the build
process, the previous selection of the root file system with a command-line parameter is no longer