change image architecture from arm to amd64

Author: pblaas

addons/dns-addon.yaml

@@ -82,7 +82,7 @@ spec:
           name: dns-tcp-local
           protocol: TCP
       - name: dnsmasq
-        image: gcr.io/google_containers/k8s-dns-dnsmasq-arm64:1.14.7
+        image: gcr.io/google_containers/k8s-dns-dnsmasq-amd64:1.14.7
         livenessProbe:
           httpGet:
             path: /healthz-dnsmasq