fix missing .exe suffix for cli file for windows downloading, unable replacing self cli binary

[hailaz]

修复Windows下载无exe后缀问题，同时修复下载后无法替换自身的问题。
#2618

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.01 ⚠️

Comparison is base (1408385) 78.83% compared to head (021f8ae) 78.83%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2622      +/-   ##
==========================================
- Coverage   78.83%   78.83%   -0.01%     
==========================================
  Files         631      631              
  Lines       51715    51715              
==========================================
- Hits        40770    40768       -2     
- Misses       8924     8926       +2     
  Partials     2021     2021              

Flag	Coverage Δ
go-1.15-386	78.87% <ø> (+0.11%)	⬆️
go-1.15-amd64	78.86% <ø> (+0.01%)	⬆️
go-1.16-386	78.86% <ø> (ø)
go-1.16-amd64	78.88% <ø> (+0.02%)	⬆️
go-1.17-386	78.86% <ø> (+0.01%)	⬆️
go-1.17-amd64	78.87% <ø> (+0.03%)	⬆️
go-1.18-386	78.81% <ø> (+0.02%)	⬆️
go-1.18-amd64	78.79% <ø> (?)

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see 1 file with indirect coverage changes

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[gqcn]

@hailaz Awesome!