Headings are used to populate release note TOC. Change-Id: I39b018ed4498555044616a3aa660abe1047b5449 Signed-off-by: Tom Hiller <thrilleratplay@gmail.com> Reviewed-on: https://review.coreboot.org/27720 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Martin Roth <martinroth@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>