fix: Col default width

[shaodahong]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

Fixes #19981

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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View rendered components/grid/demo/basic.md

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[codecov]

Codecov Report

Merging #19983 into 4.0-prepare will decrease coverage by <.01%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           4.0-prepare   #19983      +/-   ##
===============================================
- Coverage        97.55%   97.55%   -0.01%     
===============================================
  Files              292      292              
  Lines             7210     7209       -1     
  Branches          1994     1955      -39     
===============================================
- Hits              7034     7033       -1     
  Misses             176      176

Impacted Files	Coverage Δ
components/table/hooks/usePagination.ts	100% <0%> (ø)	⬆️

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