fix: 多行文本二次渲染后少一行

[Alexzjt]

👀 PR includes

✨ Feature

• New feature

🎨 Enhance

• Code style optimization
• Refactoring
• Change the UI
• Improve the performance
• Type optimization

🐛 Bugfix

• Solve the issue and close 🐛react在rerender后maxLines计算错误 #3087

🔧 Chore

• Test case
• Docs / demos update
• CI / workflow
• Release version
• Other ()

📝 Description

🖼️ Screenshot

Before	After

🔗 Related issue link

#3087

🔍 Self-Check before the merge

• Add or update relevant docs.
• Add or update relevant demos.
• Add or update test case.
• Add or update relevant TypeScript definitions.

[github-actions]

你好 @Alexzjt，非常感谢你的贡献.
为了让代码更健壮, 请根据 贡献指南 补充相应单元测试 (文档改动或其他特殊场景除外), 如果有 API 改动, 请修改 相应的文档.
同时请检查 lint 和 test 相关 CI 是否通过, 如果失败, 请点击 [Details] 按钮查看, 并根据日志修复.

Hello, @Alexzjt, Thanks for your contribution. In order to make the code more robust, please add the corresponding unit tests, and update the docs if there are API changes.
At the same time, please check whether the CI related to lint and test passes. If the CI fails, please click [Details] button to check and repair according to the log.

[petercat-assistant]

Walkthrough

This PR addresses a bug related to rendering text with a maximum number of lines (maxLines) correctly after rendering twice. It introduces a test case to ensure the functionality works as expected and modifies the calculation logic for maxLines in the base cell component.

Changes

File(s)	Summary
packages/s2-core/__tests__/bugs/issue-3087-spec.ts	Added a test case to verify that text with maxLines renders correctly after rendering twice.
packages/s2-core/src/cell/base-cell.ts	Changed the calculation of maxLines from using Math.floor to Math.round to improve accuracy.