fix: Grub root device must be placed in a proper location to avoid bo…

[aliel]

Fix boot issue when installing or upgrading new kernel version
correct grub config was missing

Self proofreading checklist

• The new code clear, easy to read and well commented.
• New code does not duplicate the functions of builtin or popular libraries.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.61%. Comparing base (a5e3fef) to head (ab3a4ed).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #805      +/-   ##
==========================================
+ Coverage   64.57%   64.61%   +0.04%     
==========================================
  Files          78       78              
  Lines        7094     7094              
  Branches      598      598              
==========================================
+ Hits         4581     4584       +3     
+ Misses       2313     2310       -3     
  Partials      200      200              

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