Update article.md

[Turnip1202]

I think this example is better written this way.

目标章节：例如 1-js/01-getting-started/1-intro

当前上游最新 commit：此处填写本项目英文版 https://github.com/javascript-tutorial/en.javascript.info 的最新 commit，例如 b03ca00

本 PR 所做更改如下：

文件名	参考上游 commit	更改（理由）
article.md	a23882d	修改部分错误

注意，参考上游 commit 是指你所修改的文件，在英文仓库中同名文件的对应 commit，即你此次提交的修改的依据。如果本 PR 你只是提交一个文字或者语句优化，并非根据上游英文仓库的修改而提交的更新，则请填无。

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[xuesongde]

这是来自QQ邮箱的假期自动回复邮件。   您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

[songhn233]

这里是等价的说明，for 应该不需要用 generator 再改写

[javascript-translate-bot]

Please make the requested changes. After it, add a comment "/done".
Then I'll ask for a new review 👻