Create how-to-contribute-to-open-source-for-technical-writers.md

[Narcissus91]

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 #1110

[Narcissus91]

@miyaliu666 这篇翻译好了

[miyaliu666]

谢谢 @Narcissus91 翻译这篇文章，译文一如既往地棒！