Update kube-router to v1.2.3

upup/models/cloudup/resources/addons/networking.kuberouter/k8s-1.12.yaml.template

@@ -56,7 +56,7 @@ spec:
       serviceAccountName: kube-router
       containers:
       - name: kube-router
-        image: docker.io/cloudnativelabs/kube-router:v1.1.1
+        image: docker.io/cloudnativelabs/kube-router:v1.2.3
         args:
         - --run-router=true
         - --run-firewall=true
@@ -97,7 +97,7 @@ spec:
           readOnly: false
       initContainers:
       - name: install-cni
-        image: docker.io/cloudnativelabs/kube-router:v1.1.1
+        image: docker.io/cloudnativelabs/kube-router:v1.2.3
         command:
         - /bin/sh
         - -c

upup/pkg/fi/cloudup/bootstrapchannelbuilder/bootstrapchannelbuilder.go

@@ -838,7 +838,7 @@ func (b *BootstrapChannelBuilder) buildAddons(c *fi.ModelBuilderContext) (*chann
 	if b.Cluster.Spec.Networking.Kuberouter != nil {
 		key := "networking.kuberouter"
 		versions := map[string]string{
-			"k8s-1.12": "1.1.1-kops.1",
+			"k8s-1.12": "1.2.3-kops.1",
 		}
 
 		{