Fix Ruby SHA in installation guide
The Ruby SHA that we were checking against in the installation guide was wrong. I replaced it with sha256sum which is also present in the Ruby downloads page. Also added it as a note in the doc styleguide.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
The Ruby SHA that we were checking against in the installation guide was wrong. I replaced it with sha256sum which is also present in the Ruby downloads page. Also added it as a note in the doc styleguide.