zh-cn: update the description of the `beforeprint` event

[yuexiaqingmiao]

The beforeprint event is fired when the associated document is about to be printed or previewed for printing.

当相关联的文档即将打印或关闭打印预览时，将触发 beforeprint 事件。

当相关联的文档即将打印或预览打印时，将触发 beforeprint 事件。

Description

Motivation

Additional details

Related issues and pull requests

[github-actions[bot]]

Preview URLs

• /zh-CN/docs/Web/API/Window/beforeprint_event

[yuexiaqingmiao]

原始英文：The beforeprint event is fired when the associated document is about to be printed or previewed for printing.

当前中文：当相关联的文档即将打印或关闭打印预览时，将触发 beforeprint 事件。

调整后中文：当相关联的文档即将打印或预览打印时，将触发 beforeprint 事件。