fix typo

[wuxiangzhou2010]

No description provided.

[codecov]

Codecov Report

Merging #992 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #992      +/-   ##
==========================================
+ Coverage   75.44%   75.51%   +0.07%     
==========================================
  Files         206      206              
  Lines        9468     9468              
==========================================
+ Hits         7143     7150       +7     
+ Misses       1658     1650       -8     
- Partials      667      668       +1

Impacted Files	Coverage Δ
router.go	82.6% <ø> (ø)	⬆️
proxy/vmess/outbound/outbound.go	78.65% <0%> (-2.25%)	⬇️
transport/internet/headers/http/http.go	79.43% <0%> (-2.13%)	⬇️
transport/ray/direct.go	83.19% <0%> (-1.69%)	⬇️
proxy/shadowsocks/client.go	69.47% <0%> (-1.06%)	⬇️
common/buf/copy.go	76.47% <0%> (+7.84%)	⬆️
app/proxyman/mux/session.go	85.91% <0%> (+15.49%)	⬆️

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