Translate how-to-contribute (#123)

* Translate how-to-contribute

* Fix typo in how-to-contribute

* fix lint errors and changed some exression

* Update content/docs/how-to-contribute.md

Co-Authored-By: oimo23 <[email protected]>

* Update content/docs/how-to-contribute.md

Co-Authored-By: oimo23 <[email protected]>

* Update content/docs/how-to-contribute.md

Co-Authored-By: oimo23 <[email protected]>

* Fix lint error

* Fix some expression and line breaks

* Apply suggestions from code review

Co-Authored-By: oimo23 <[email protected]>

* Apply suggestions from code review

Co-Authored-By: oimo23 <[email protected]>

Author: oimo23