如何通过参与开源贡献提升技术写作能力

[Rhea-xiao]

Checklist:

• [x] I have read freeCodeCamp's contribution guidelines.
• [x] My pull request has a descriptive title (not a vague title like Update index.md)

Closes #1161

[Rhea-xiao]

The translation is completed. Please take a review. Thanks! @miyaliu666

[miyaliu666]

翻译非常好！我喜欢这篇文章里说的为开源软件写教程这个想法。

谢谢！