feat: add task to create a monthly cronjob for restarting k3s

pb_install.yml

@@ -1,7 +1,7 @@
 ---
-- hosts: all
+- name: Install k3s server
+  hosts: all
   gather_facts: false
-  name: Install k3s server
   tags: k3s-server
   tasks:
     - name: Download k3s install script
@@ -20,15 +20,20 @@
         name: k3s
         state: started
         enabled: true
+    - name: Add restart cronjob
+      ansible.builtin.cron:
+        name: "restart k3s (and regenerate certs if necessary)"
+        special_time: monthly
+        job: "systemctl restart k3s"
     - name: Get kubeconfig
       ansible.builtin.fetch:
         src: /etc/rancher/k3s/k3s.yaml
         dest: kubeconfig_{{ ansible_host }}.yml
         flat: true
 
-- hosts: all
+- name: Deploy baseline
+  hosts: all
   gather_facts: false
-  name: Deploy baseline
   tags: baseline
   tasks:
     - name: Copy manifest