add another line

Author: Patrick M

_posts/2022-12-18-lxc-setup.md

@@ -75,4 +75,6 @@ Unattended-Upgrade::InstallOnShutdown "false";
 <--->
 
 Unattended-Upgrade::Remove-Unused-Dependencies "true";
+
+Unattended-Upgrade::Automatic-Reboot "true";
 ```