improve knot roles reloading behavior

With this change, the nameserver is not restarted on configuration
updates but only reloaded instead.

roles/knot/handlers/main.yaml

@@ -1,16 +1,10 @@
 ---
-- name: restart knot
+- name: reload knot
   tags: [ auth-dns ]
   become: true
   ansible.builtin.systemd:
     name: knot.service
-    state: restarted
-
-- name: reload knot zones
-  tags: [ auth-dns ]
-  become: true
-  changed_when: true
-  ansible.builtin.command: "knotc zone-reload"
+    state: reloaded
 
 - name: netplan apply
   tags: [ auth-dns ]

roles/knot/tasks/02-configure.yaml

@@ -13,7 +13,7 @@
 - name: Deploy knot configuration file
   tags: [ auth-dns ]
   become: true
-  notify: restart knot
+  notify: reload knot
   ansible.builtin.template:
     src: knot.conf.j2
     dest: /etc/knot/knot.conf
@@ -24,7 +24,7 @@
 - name: Deploy configured zones
   tags: [ auth-dns ]
   become: true
-  notify: reload knot zones
+  notify: reload knot
   loop: "{{ knot__zones }}"
   loop_control:
     label: "{{ item.domain }}"