fix(Picker,Dropdown): change caret icon

[SevenOutman]

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[codecov]

Codecov Report

Merging #2537 (7b8b3c8) into main (746c2b2) will increase coverage by 0.02%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #2537      +/-   ##
==========================================
+ Coverage   85.28%   85.30%   +0.02%     
==========================================
  Files         293      293              
  Lines        9084     9084              
  Branches     2552     2552              
==========================================
+ Hits         7747     7749       +2     
+ Misses        701      700       -1     
+ Partials      636      635       -1     

Flag	Coverage Δ
ChromeCi	85.28% <50.00%> (ø)
Firefox	85.28% <50.00%> (?)

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Impacted Files	Coverage Δ
src/utils/useToggleCaret.tsx	57.14% <50.00%> (ø)
src/utils/useRootClose.ts	84.00% <0.00%> (+8.00%)	⬆️

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[simonguo]

我觉得修改前的图标从视觉上来说更合理一些