Fix the doc of network plugin version

pkg/kubelet/network/exec/exec.go

@@ -33,7 +33,7 @@ limitations under the License.
 //                formatted output indicating the pod's IPAddress(v4/v6). An empty string value or an erroneous output
 //                will mean the container runtime (docker) will be asked for the PodIP
 //                e.g. {
-//                         "apiVersion" : "v1",
+//                         "apiVersion" : "v1beta1",
 //                         "kind" : "PodNetworkStatus",
 //                         "ip" : "10.20.30.40"
 //                     }

pkg/kubelet/network/plugins.go

@@ -56,7 +56,7 @@ type NetworkPlugin interface {
 }
 
 // PodNetworkStatus stores the network status of a pod (currently just the primary IP address)
-// This struct represents version "v1"
+// This struct represents version "v1beta1"
 type PodNetworkStatus struct {
 	unversioned.TypeMeta `json:",inline"`