Fix NSX role list

Separate security and network admin roles to separate lines.

Author: khensler-msft

articles/azure-vmware/concepts-identity.md

@@ -163,7 +163,8 @@ Unlike on-premises deployment, not all pre-defined NSX-T Data Center RBAC roles
  In an Azure VMware Solution deployment, the following NSX-T Data Center predefined RBAC roles are not supported with LDAP integration:
 
 - Enterprise Admin
-- Network AdminSecurity Admin
+- Network Admin
+- Security Admin
 - Netx Partner Admin
 - GI Partner Admin