fix：wechat input fixed error

[zhou-yg]

First of all, thank you for your contribution! :-)

Please makes sure that these checkboxes are checked before submitting your PR, thank you!

• Make sure that you follow antd's code convention.
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Extra checklist:

if isBugFix :

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

elif isNewFeature :

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This change is 

[zhou-yg]

#3137

detail:

https://www.google.com/search?q=%E5%BE%AE%E4%BF%A1+fixed+input+%E9%94%AE%E7%9B%98

[codecov]

Codecov Report

Merging #3280 into master will decrease coverage by 0.05%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #3280      +/-   ##
==========================================
- Coverage   64.87%   64.81%   -0.06%     
==========================================
  Files          92       92              
  Lines        2303     2305       +2     
  Branches      663      663              
==========================================
  Hits         1494     1494              
- Misses        800      802       +2     
  Partials        9        9

Flag	Coverage Δ
#web	64.81% <0%> (-0.06%)	⬇️

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

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[likezero]

Close by #3346