playbook: support Fedora >= 34

ntp package has been removed in Fedora 34 (see https://fedoraproject.org/wiki/Changes/NtpReplacement)

playbook/roles/ntp/meta/main.yml

 ---
 dependencies:
-  - { role: package, package_name: ntp, package_state: present }
+  - { role: package, package_name: ntp, package_state: present, when: ansible_distribution != "Fedora" or ansible_distribution_major_version|int < 34 }
+  - { role: package, package_name: ntpsec, package_state: present, when: ansible_distribution == "Fedora" and ansible_distribution_major_version|int >= 34 }