improve ci by using cache feature of setup-go

[hailaz]

减少流程消耗

[codecov-commenter]

Codecov Report

Base: 79.56% // Head: 79.57% // Increases project coverage by +0.01% 🎉

Coverage data is based on head (dea21bc) compared to base (ad737de).
Patch has no changes to coverable lines.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2463      +/-   ##
==========================================
+ Coverage   79.56%   79.57%   +0.01%     
==========================================
  Files         599      599              
  Lines       49777    49777              
==========================================
+ Hits        39605    39611       +6     
+ Misses       8180     8173       -7     
- Partials     1992     1993       +1     

Flag	Coverage Δ
go-1.15-386	?
go-1.15-amd64	79.63% <ø> (+<0.01%)	⬆️
go-1.16-386	79.61% <ø> (+<0.01%)	⬆️
go-1.16-amd64	?
go-1.17-386	79.62% <ø> (+<0.01%)	⬆️
go-1.17-amd64	79.60% <ø> (+0.02%)	⬆️
go-1.18-386	79.55% <ø> (-0.01%)	⬇️
go-1.18-amd64	79.54% <ø> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
os/gfsnotify/gfsnotify_watcher_loop.go	83.19% <0.00%> (+5.04%)	⬆️

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