update sales demo script

Amara Nwaigwe requested to merge add-sales-demo into master

This is the new MR, replacing https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/6053

This MR updates the sales demo page to include the proposed sales demo which has a shorter setup, a section on instance administration, and 2 demo flows (1 for legacy VCS and another for DevOps/CD)

Sales and success engineers, please watch the video walkthrough to review the demo script and leave feedback on this merge request.

Merge request reports