improve knot roles reloading behavior

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

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 }}"