dashboard: Document /ui alias breakage on kubernetes 1.6.x

Environment

Dashboard version: latest
Kubernetes version: 1.6.7
Operating system: Fedora Atomic 26

The latest documentation mentions going to the following url: (which works under 1.6.7)

• /api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

However, the /ui alias on kubernetes 1.6.7 goes to:

• /api/v1/namespaces/kube-system/services/kubernetes-dashboard/proxy/

which results in:

Error: 'malformed HTTP response "\x15\x03\x01\x00\x02\x02"'
Trying to reach: 'http://10.244.19.2:8443/'

It’s pretty easy to miss the url difference in the documentation vs the older /ui alias. Might want to mention the alias is broken in 1.6.7 after the dashboard https change. (especially since the dashboard is the first container people fire-up on new k8s clusters)