[PATCH] riscv: kexec_image: Fix dead link to boot-image-header.rst

[Paul Walmsley]

On Thu, 4 Dec 2025, Soham Metha wrote:

> Fix the reference to 'boot-image-header.rst', which was moved to
> 'Documentation/arch/riscv/' in commit 'ed843ae947f8' 
> ("docs: move riscv under arch").
> 
> Signed-off-by: Soham Metha <sohammetha01 at gmail.com>

Thanks, queued for v6.19-rc.


- Paul