Do not use ‘yes/no’ for boolean values (#11472)

Consistent boolean values in ansible playbooks

roles/kubernetes/control-plane/tasks/kubeadm-fix-apiserver.yml

@@ -5,7 +5,7 @@
     dest: "{{ kube_config_dir }}/{{ item }}"
     regexp: '^    server: https'
     line: '    server: {{ kube_apiserver_endpoint }}'
-    backup: yes
+    backup: true
   with_items:
     - admin.conf
     - controller-manager.conf