fix(pro:search): overflowd item count is incorrect

[sallerli1]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

搜索项溢出时，溢出的数量不正确

What is the new behavior?

修复以上问题

Other information

[idux-bot]

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[codecov]

Codecov Report

Merging #1732 (fe4f3f5) into main (203ddee) will decrease coverage by 0.02%.
The diff coverage is 13.33%.

❗ Current head fe4f3f5 differs from pull request most recent head bdebdc1. Consider uploading reports for the commit bdebdc1 to get more accurate results

@@            Coverage Diff             @@
##             main    #1732      +/-   ##
==========================================
- Coverage   92.32%   92.31%   -0.02%     
==========================================
  Files         346      346              
  Lines       32778    32784       +6     
  Branches     2727     2727              
==========================================
+ Hits        30261    30263       +2     
- Misses       2517     2521       +4     

Files	Coverage Δ
packages/pro/search/src/ProSearch.tsx	15.81% <13.33%> (+0.42%)	⬆️