Assure script is installed for dom0 update

[alimirjamali]

On Fedora 42, script executable is moved to util-linux-script package. It is required for qubes-download-dom0-update.sh to work.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.46%. Comparing base (254075f) to head (f472cd0).
Report is 9 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #561   +/-   ##
=======================================
  Coverage   70.46%   70.46%           
=======================================
  Files           3        3           
  Lines         474      474           
=======================================
  Hits          334      334           
  Misses        140      140           

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