Refactor audit events docs
What does this MR do?
Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/4108
Review: http://ee-docs-audit-events.178.62.207.141.xip.io/ee/administration/audit_events.html
Edited by 🤖 GitLab Bot 🤖
Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/4108
Review: http://ee-docs-audit-events.178.62.207.141.xip.io/ee/administration/audit_events.html