adding windows commands

Signed-off-by: Mike Stevenson <Mike.Stevenson@us.logicalis.com>

docs/12-dns-addon.md

@@ -56,10 +56,16 @@ busybox-2125412808-mt2vb   1/1       Running   0          15s
 
 Retrieve the full name of the `busybox` pod:
 
+#### Linux & OS X
 ```
 POD_NAME=$(kubectl get pods -l run=busybox -o jsonpath="{.items[0].metadata.name}")
 ```
 
+#### Windows
+```
+$POD_NAME=$(kubectl get pods -l run=busybox -o jsonpath="{.items[0].metadata.name}")
+```
+
 Execute a DNS lookup for the `kubernetes` service inside the `busybox` pod:
 
 ```