Move dashboard to head

Failed to pull image
"k8s.gcr.io/kubernetes-dashboard-arm:v2.0.0-alpha0"

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

GUIDE.md

@@ -329,7 +329,7 @@ subjects:
 This is the development/alternative dashboard which has TLS disabled and is easier to use.
 
 ```
-$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/alternative/kubernetes-dashboard-arm.yaml
+$ kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/master/aio/deploy/alternative/kubernetes-dashboard-arm-head.yaml
 ```
 
 You can then find the IP and port via `kubectl get svc -n kube-system`. To access this from your laptop you will need to use `kubectl proxy` and navigate to `http://localhost:8001/` on the master, or tunnel to this address with `ssh`.