Doc/security/vboot: Add a script generated device list

Add a script generated list of vboot enabled devices to the
documentation. Add a entry to the release checklist.

Change-Id: Ibb57d26c5f0cb8efd27ca9a97fd762c25b566f93
Signed-off-by: Marcello Sylvester Bauer <sylv@sylv.io>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39200
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/vboot_list/description.md

@@ -0,0 +1,2 @@
+Tools to generate a list of vboot enabled devices to the documentation
+`Bash`