Fix nginx path in nfs pod example.

nginx document root has changed. This updates the document
root in the nfs example.

Signed-off-by: Sami Wagiaalla <swagiaal@redhat.com>

examples/nfs/nfs-web-pod.yaml

@@ -17,7 +17,7 @@ spec:
       volumeMounts:
           # name must match the volume name below
           - name: nfs
-            mountPath: "/var/www/html"
+            mountPath: "/usr/share/nginx/html"
   volumes:
     - name: nfs
       nfs: