ServiceNow Force Scheduled Job into Update Set

2 approaches:

- use the 'force to update set' button which is a utility available on the Share:

Force to update set UI Action

- use the following approach:

Add Scheduled Job to Update Set

basically, for the second approach:

Make the update set you want to capture this your current update set and just run this background script

var gr = new GlideRecord('sysauto_script');
gr.get('<sys_id of your scheduled job>');
var gum = new GlideUpdateManager2();
gum.saveRecord(gr);

It will get captured in your current update set.