[Install Guide] Update security command output
[Install Guide] Update security command output

Update command output for security group rule
creation when launching an instance.

Change-Id: I753f698a3b1cb435e09e7ea2b04df370c4401a9a

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals