Update project security dashboard documentation
What does this MR do?
Affected doc page: https://docs.gitlab.com/ee/user/application_security/security_dashboard/#project-security-dashboard
This MR follows up on https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13180
The project-level security dashboard has been updated and now looks like the group security dashboard. Thus, the screenshot in the documentation should be updated to reflect this change.
Does this MR meet the acceptance criteria?
Conformity
Edited by Paul Gascou-Vaillancourt