architecture/additional_concepts/authorization: fix number of SCCs.

Author: php-coder

architecture/additional_concepts/authorization.adoc

@@ -314,7 +314,7 @@ ifdef::openshift-origin,openshift-enterprise,openshift-dedicated[]
 . Controlling the usage of volume types
 . Configuring allowable seccomp profiles
 
-Six SCCs are added to the cluster by default, and are viewable by cluster
+Seven SCCs are added to the cluster by default, and are viewable by cluster
 administrators using the CLI:
 
 ====