fix: update code block style

Author: Patrick M

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

@@ -78,16 +78,35 @@ sudo nano /etc/apt/apt.conf.d/50unattended-upgrades
 
 Uncomment the following line
 
-```
-"origin=*";
+```diff
+Unattended-Upgrade::Origins-Pattern {
++    "origin=*";
+-    "origin=Debian,codename=${distro_codename}-updates";
+-//  "origin=Debian,codename=${distro_codename}-proposed-updates";
+-    "origin=Debian,codename=${distro_codename},label=Debian";
+-    "origin=Debian,codename=${distro_codename},label=Debian-Security";
+-    "origin=Debian,codename=${distro_codename}-security,label=Debian-Security";
+
+-    // Archive or Suite based matching:
+-    // Note that this will silently match a different release after
+-    // migration to the specified archive (e.g. testing becomes the
+-    // new stable).
+-//  "o=Debian,a=stable";
+-//  "o=Debian,a=stable-updates";
+-//  "o=Debian,a=proposed-updates";
+-//  "o=Debian Backports,a=${distro_codename}-backports,l=Debian Backports";
+};
 
 <--->
 
-Unattended-Upgrade::InstallOnShutdown "false";
++ Unattended-Upgrade::InstallOnShutdown "false";
+- Unattended-Upgrade::InstallOnShutdown "true";
 
 <--->
 
-Unattended-Upgrade::Remove-Unused-Dependencies "true";
++ Unattended-Upgrade::Remove-Unused-Dependencies "true";
+- Unattended-Upgrade::Remove-Unused-Dependencies "false";
 
-Unattended-Upgrade::Automatic-Reboot "true";
++ Unattended-Upgrade::Automatic-Reboot "true";
+- Unattended-Upgrade::Automatic-Reboot "false";
 ```