playbook: Ignore ntp check

It's not possible on Ubuntu/Focal

playbook/roles/ntp/tasks/main.yml

 ---
+# Check disabled on Ubuntu Focal, as it's not possible there
+# https://github.com/ansible/ansible/issues/71528
   - name: ensure ntp is runing
     service: name=ntp state=started enabled=yes
-    when: ansible_os_family == "Debian"
+    when: ansible_os_family == "Debian" and (ansible_distribution != "Ubuntu" and ansible_distribution_release != "focal")
 
   - name: ensure ntp is runing (RedHat)
     service: name=ntpd state=started enabled=yes