Fix etcd replicaCount

[haorenfsa]

fix #197

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[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.93%. Comparing base (39df548) to head (3e9aef5).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/util/util.go	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #202      +/-   ##
==========================================
+ Coverage   80.92%   80.93%   +0.01%     
==========================================
  Files          57       57              
  Lines        6355     6364       +9     
==========================================
+ Hits         5143     5151       +8     
- Misses       1016     1017       +1     
  Partials      196      196              

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