[bugfix][docs] Updates examples to match spec criteria

examples/flannel-conf.yml

@@ -2,11 +2,11 @@ apiVersion: "kubernetes.cni.cncf.io/v1"
 kind: Network
 metadata:
   name: flannel-conf
-plugin: flannel
-args: '[
-        {
+spec: 
+  config: '{
+    "cniVersion": "0.3.0",
+    "type": "flannel",
     "delegate": {
       "isDefaultGateway": true
     }
-        }
-]'
+  }'

examples/macvlan-conf.yml

@@ -2,9 +2,10 @@ apiVersion: "kubernetes.cni.cncf.io/v1"
 kind: Network
 metadata:
   name: macvlan-conf
-plugin: macvlan
-args: '[
-        {
+spec: 
+  config: '{
+      "cniVersion": "0.3.0",
+      "type": "macvlan",
       "master": "eth0",
       "mode": "bridge",
       "ipam": {
@@ -17,5 +18,4 @@ args: '[
         ],
         "gateway": "192.168.1.1"
       }
-        }
-]'
+    }'