Bug: Fix unattended-upgrades for LEAP debs

Resolves: #8891

puppet/modules/site_apt/templates/51unattended-upgrades-leap

 // this file is managed by puppet !
 
 Unattended-Upgrade::Origins-Pattern {
-  "site=deb.leap.se,component=<%= @apt_platform_component %>";
+  "site=deb.leap.se,codename=<%= @apt_platform_component %>";
 }