Fix example about ps and linked containers
Fix example about ps and linked containers

Signed-off-by: Alexander Morozov <4efb7da3e38416208b41d8021a942884d8a9435c@docker.com>

ashfall/cli,ashfall/cli,allencloud/cli,Zebrilee/cli,Zebrilee/cli,e11137/cli,thaJeztah/cli,cpuguy83/cli,dnephin/cli,docker/cli,e11137/cli,redpanda/cli,allencloud/cli,riyazdf/cli,redpanda/cli,docker/cli,dnephin/cli,cpuguy83/cli,thaJeztah/cli,riyazdf/cli