Update doc.md

[Go7hic]

项目里面没有 page.wpy com.wpy，改成对应的路径描述

Checklist

• npm run test passes
• tests and/or benchmarks are included
• documentation is changed or added
• cases or donate is changed or added
• documentation is changed or added

[coveralls]

Coverage remained the same at 86.049% when pulling 1dee42c on dyygtfx:patch-2 into fd749d6 on Tencent:master.

[Gcaufy]

这里是有些问题，原来的有些不妥，但改成现在的也不妥。
这里是泛指，并不是要具体指page.wpy或者pages/*.wpy
，必须我也可以放在其它目录，没必要指定到文件，建议去掉，就直接说组件， 页面。

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.
因为这个 Issue 最近没有任何有效回复，所以被自动标记为了stale。 如果在未来7天依旧没有任何激活操作，那么该 Issue 将会被自动关闭。 感谢您的提问。