fix(comp:table): fixed column background color error is selected

[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?

固定列被选中后，背景颜色错误，导致文字重叠

What is the new behavior?

Other information

[idux-bot]

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[codecov]

Codecov Report

Merging #1543 (85e8d39) into main (6cd6155) will not change coverage.
The diff coverage is n/a.

❗ Current head 85e8d39 differs from pull request most recent head 9e89d8b. Consider uploading reports for the commit 9e89d8b 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