fix: sample code for the cluster section

[dengkailu]

• fix [BUG]kb configure -h Error in sample code #310

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.90%. Comparing base (7dc2556) to head (87ba834).

❗ Current head 87ba834 differs from pull request most recent head cd0092a. Consider uploading reports for the commit cd0092a to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #317   +/-   ##
=======================================
  Coverage   42.90%   42.90%           
=======================================
  Files         213      213           
  Lines       28946    28946           
=======================================
  Hits        12419    12419           
  Misses      15000    15000           
  Partials     1527     1527           

Flag	Coverage Δ
unittests	42.90% <ø> (ø)

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