fix: fix prompt can not focus in Wechat

[likezero]

close #3137

Thanks for #3280

• Make sure that you follow antd's code convention.
• Run npm run lint and fix those errors before submitting in order to keep consistent code style.
• Rebase before creating a PR to keep commit history clear.
• Add some descriptions and refer relative issues for you PR.

Extra checklist:

if isBugFix :

• [x ] Make sure that you add at least one unit test for the bug which you had fixed.

elif isNewFeature :

• Update API docs for the component.
• Update/Add demo to demonstrate new feature.
• Update TypeScript definition for the component.
• Add unit tests for the feature.

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This change is 

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@628027b). Click here to learn what that means.
The diff coverage is 0%.

@@           Coverage Diff            @@
##             master   #3346   +/-   ##
========================================
  Coverage          ?   64.6%           
========================================
  Files             ?      92           
  Lines             ?    2314           
  Branches          ?     669           
========================================
  Hits              ?    1495           
  Misses            ?     813           
  Partials          ?       6

Flag	Coverage Δ
#web	64.6% <0%> (?)

Impacted Files	Coverage Δ
components/modal/prompt.tsx	0% <0%> (ø)

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[ziluo]

+1