fix(toast): 修复preventScrollThrough属性无效

[yaogengzhu]

fix #919

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

💡 需求背景和解决方案

📝 更新日志

fix(toast): 修复 preventScrollThrough 属性无效

• 本条 PR 不需要纳入 Changelog

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• 文档已补充或无须补充
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[github-actions]

[github-actions]

Size Change: +109 B (0%)

Total Size: 387 kB

Filename	Size	Change
./dist/tdesign.js	204 kB	+64 B (0%)
./dist/tdesign.min.js	118 kB	+45 B (0%)

ℹ️ View Unchanged

Filename	Size
./dist/reset.css	672 B
./dist/tdesign.css	37.4 kB
./dist/tdesign.min.css	27.2 kB

[github-actions]

Size Change: +125 B (0%)

Total Size: 387 kB

Filename	Size	Change
./dist/tdesign.js	204 kB	+86 B (0%)
./dist/tdesign.min.js	118 kB	+39 B (0%)

ℹ️ View Unchanged

Filename	Size
./dist/reset.css	672 B
./dist/tdesign.css	37.4 kB
./dist/tdesign.min.css	27.2 kB

[github-actions]

Size Change: +125 B (0%)

Total Size: 387 kB

Filename	Size	Change
./dist/tdesign.js	204 kB	+86 B (0%)
./dist/tdesign.min.js	118 kB	+39 B (0%)

ℹ️ View Unchanged

Filename	Size
./dist/reset.css	672 B
./dist/tdesign.css	37.4 kB
./dist/tdesign.min.css	27.2 kB

[github-actions]

Size Change: +125 B (0%)

Total Size: 387 kB

Filename	Size	Change
./dist/tdesign.js	204 kB	+86 B (0%)
./dist/tdesign.min.js	118 kB	+39 B (0%)

ℹ️ View Unchanged

Filename	Size
./dist/reset.css	672 B
./dist/tdesign.css	37.4 kB
./dist/tdesign.min.css	27.2 kB