fix: Cascader conduction missing async value

[zombieJ]

resolve ant-design/ant-design#32184

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[codecov]

Codecov Report

Merging #384 (70cfc6a) into master (5fb293c) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #384   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          548       548           
  Branches       163       163           
=========================================
  Hits           548       548           

Impacted Files	Coverage Δ
src/generate.tsx	100.00% <ø> (ø)

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