fix(docs): strikethrough position is incorrect

[Jocs]

close #1757

[github-actions]

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📑 Examples	📚 Storybook
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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 29.57%. Comparing base (9e76a28) to head (19e8a72).
Report is 2 commits behind head on dev.

Files	Patch %	Lines
...gine-render/src/components/docs/extensions/line.ts	0.00%	7 Missing ⚠️
...c/components/docs/extensions/font-and-base-line.ts	0.00%	4 Missing ⚠️
packages/engine-render/src/basics/tools.ts	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1836      +/-   ##
==========================================
- Coverage   29.96%   29.57%   -0.39%     
==========================================
  Files        1163     1163              
  Lines       63128    63135       +7     
  Branches    13273    13277       +4     
==========================================
- Hits        18914    18675     -239     
- Misses      44214    44460     +246     

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[zhaolixin7]

@Jocs 删除线的位置还是不对

[univer-bot]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

@Jocs The strikethrough position is still wrong.

[wzhudev]

LGTM