Update index.html.md Fixed broken link to "3 Thinks I learned in my first month at GitLab"
fixed 404 error in https://about.gitlab.com/handbook/general-onboarding/#working-remotely
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
fixed 404 error in https://about.gitlab.com/handbook/general-onboarding/#working-remotely