Merge branch 'tr-update-group-security-dashboard-docs' into 'master'

Update group security dashboard docs - CE backport See merge request gitlab-org/gitlab-ce!28471

Merge branch 'tr-update-group-security-dashboard-docs' into 'master'
Update group security dashboard docs - CE backport See merge request gitlab-org/gitlab-ce!28471
d9877120 · Achilleas Pipinellis · 890fe4ea · 39ba007b · 890fe4ea · d9877120
--- a/doc/user/application_security/security_dashboard/img/dashboard.png
+++ b/doc/user/application_security/security_dashboard/img/dashboard.png