Added "or higher" to "Plan the upgrade" section (#6820)
Added "or higher" to "Plan the upgrade" section (#6820)

Original:
`As part of the upgrade process, you'll upgrade the Docker EE Engine
installed on each node of the cluster to version 17.06.2-ee-8.`
Added "or higher"
johnstep/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,anweiss/docker.github.io,anweiss/docker.github.io,anweiss/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io