sign_official_build: add missing info keyword

This got removed in a refactor.

BUG=b:339024336
TEST=None
BRANCH=None

Change-Id: I9e841cebf43e22e5c812f66b86a4ac57d12b893b
Signed-off-by: Benjamin Shai <bshai@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/5546652
Reviewed-by: George Engelbrecht <engeg@google.com>
1 file changed