Add x86_64-linux-kernel2 validation to release checklist
Add x86_64-linux-kernel2 validation to release checklist

Signed-off-by: Scott Macfarlane <61ab88da22e66a307c8750ba8405a298806f7634@chef.io>

habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,rsertelon/habitat,rsertelon/habitat,habitat-sh/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat,rsertelon/habitat,habitat-sh/habitat