Translate How-To-Contribute (#126)

* Korean Translate [how-to-contribute.md

* Korean Translate [how-to-contribute.md]

* Update how to contribute

This commit includes resolving a merge conflict.

* Apply speller check result

Co-authored-by: ReturnReason <reasonz@daum.net>
Co-authored-by: Taehwan Noh <taehwanno.dev@gmail.com>