fix: cell margin bottom should over 1

[lumixraku]

close https://github.com/dream-num/univer-pro/issues/2330

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

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Playwright test results

 8 passed

Details

 8 tests across 3 suites
 2 minutes, 11 seconds
 9ef96e2
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Codecov Report

Attention: Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.

Project coverage is 31.84%. Comparing base (b94743c) to head (776023a).

Files with missing lines	Patch %	Lines
packages/engine-render/src/viewport.ts	0.00%	13 Missing ⚠️
packages/engine-render/src/canvas.ts	0.00%	2 Missing ⚠️
...ine-render/src/components/sheets/sheet-skeleton.ts	0.00%	1 Missing ⚠️
...lers/render-controllers/sheet.render-controller.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3595      +/-   ##
==========================================
- Coverage   31.84%   31.84%   -0.01%     
==========================================
  Files        2194     2194              
  Lines      115304   115307       +3     
  Branches    25398    25399       +1     
==========================================
  Hits        36719    36719              
- Misses      78585    78588       +3     

Flag	Coverage Δ
	31.84% <0.00%> (-0.01%)	⬇️

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