Merge branch 'docs-fix-badge' into 'master'

Docs: Add security dashboard missing badge

See merge request gitlab-org/gitlab-ee!8575

doc/user/project/security_dashboard.md

-# Project Security Dashboard
+# Project Security Dashboard **[ULTIMATE]**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/issues/6165) in [GitLab Ultimate](https://about.gitlab.com/pricing) 11.1.