Fix typo

[yujinqiu]

No description provided.

[codecov]

Codecov Report

Merging #928 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #928      +/-   ##
=========================================
- Coverage   75.52%   75.5%   -0.03%     
=========================================
  Files         206     206              
  Lines        9448    9448              
=========================================
- Hits         7136    7134       -2     
- Misses       1646    1648       +2     
  Partials      666     666

Impacted Files	Coverage Δ
transport/internet/kcp/dialer.go	77.35% <0%> (-7.55%)	⬇️
app/proxyman/outbound/handler.go	71.42% <0%> (+2.85%)	⬆️

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