Use unattended-upgrades again to make sure packages are up-to-date.

We don't have the time to test all upgrades in advance.  Therefore, it's
safer to install all updates unattended and live with the (rare) risk of
faulty ones.

This reverts the commits:
  b4d9cbdb94
  a29d89a7ab

roles/lmn_fvs/tasks/main.yml

@@ -132,6 +132,12 @@
         "ProxyMode": "auto_detect"
       }
 
+- name: Update all packages unattended
+  ansible.builtin.replace:
+    path: /etc/apt/apt.conf.d/50unattended-upgrades
+    regexp: '^//(\s+"origin=.+-updates";)$'
+    replace: '  \1'
+
 - name: Copy some scripts
   copy:
     src: "{{ item }}"