Fix some ansible-lint complaints.

roles/ddns-update/handlers/main.yml

@@ -2,6 +2,6 @@
   systemd:
     name: ddns-update.timer
     state: restarted
-    daemon_reload: yes
-    enabled: yes
+    daemon_reload: true
+    enabled: true
   listen: "enable ddns-update timer"

roles/ddns-update/tasks/main.yml

@@ -5,6 +5,7 @@
   template:
     src: ddns-update.conf.j2
     dest: /etc/ddns-update/ddns-update.conf
+    mode: 0644
 
 - name: install ddns-update script
   copy:
@@ -16,9 +17,11 @@
   copy:
     src: ddns-update.service
     dest: /etc/systemd/system/ddns-update.service
+    mode: 0644
 
 - name: install ddns-update.timer
   copy:
     src: ddns-update.timer
     dest: /etc/systemd/system/ddns-update.timer
+    mode: 0644
   notify: enable ddns-update timer