Add Review Apps screenshot to webpage
As requested by @sytses, include a pic with an MR view in the Review Apps feature page https://about.gitlab.com/features/review-apps/
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
As requested by @sytses, include a pic with an MR view in the Review Apps feature page https://about.gitlab.com/features/review-apps/