get wrong server name of coredns (#8811)

Signed-off-by: weizhou.lan@daocloud.io <weizhou.lan@daocloud.io>

roles/kubernetes-apps/ansible/tasks/cleanup_dns.yml

@@ -9,7 +9,7 @@
     - inventory_hostname == groups['kube_control_plane'][0]
 
 - name: Kubernetes Apps | Register coredns service annotation `createdby`
-  command: "{{ kubectl }} get svc -n kube-system kube-dns -o jsonpath='{ .metadata.annotations.createdby }'"
+  command: "{{ kubectl }} get svc -n kube-system coredns -o jsonpath='{ .metadata.annotations.createdby }'"
   register: createdby_annotation_svc
   changed_when: false
   ignore_errors: true  # noqa ignore-errors