Change IAM Security Admin to Security Admin

Author: mletalie

modules/osd-create-cluster-ccs.adoc

@@ -62,7 +62,7 @@ The project name must be 10 characters or less.
 * You have an IAM service account in GCP called `osd-ccs-admin` with the following roles attached:
   ** Compute Admin
   ** DNS Administrator
-  ** IAM Security Admin
+  ** Security Admin
   ** Service Account Admin
   ** Service Account Key Admin
   ** Service Account User