fix(comp:upload): accept does not ignore case

[liuzaijiang]

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?

accept 没有区分大小写，导致onBeforeUpload未触发

What is the new behavior?

正常触发

Other information

[idux-bot]

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[codecov]

Codecov Report

Merging #1544 (f218c81) into main (6cd6155) will not change coverage.
The diff coverage is n/a.

❗ Current head f218c81 differs from pull request most recent head 113541f. Consider uploading reports for the commit 113541f to get more accurate results

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  Coverage   92.74%   92.74%           
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  Files         330      330           
  Lines       30642    30642           
  Branches     3499     3499           
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  Hits        28420    28420           
  Misses       2222     2222