Router: Small fix.

The first time unbound-anchor is run the exit code is 1.

Ansible/roles/router/tasks/main.yaml

@@ -44,6 +44,8 @@
   ansible.builtin.command:
     cmd: /usr/sbin/unbound-anchor -a /var/unbound/db/root.key
     creates: /var/unbound/db/root.key
+  register: router_unbound_anchor
+  failed_when: router_unbound_anchor.rc not in [0, 1]
   tags:
     - network
     - dns