fix(examples): use SetWidth to fix type mismatch in help

[ManManavadaria]

Summery

Updates the help example to set the help model width via SetWidth() instead of assigning to Width directly, resolving a type mismatch

Fixes #1617

• I have read CONTRIBUTING.md.
• I have created a discussion that was approved by a maintainer (for new features).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.09%. Comparing base (ec39c45) to head (9debd01).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1620   +/-   ##
=======================================
  Coverage   56.09%   56.09%           
=======================================
  Files          25       25           
  Lines        1287     1287           
=======================================
  Hits          722      722           
  Misses        481      481           
  Partials       84       84           

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