Added Korean translation of CONTRIBUTING.md

[tank3a]

464 Issue

Added Korean translation of CONTRIBUTING.md and added CONTRIBUTING-ko link to other versions of CONTRIBUTING.

[tank3a]

What does it mean by ✖ subject may not be empty [subject-empty] ✖ type may not be empty [type-empty] from failed details?

[guastallaigor]

Hey @tank3a

Unfortunately commitlint has failed.

Could you change your commit message to something like docs: add korean contributing translation file 🙇

# edit your commit message
$ git commit --amend -m "docs: add korean contributing translation file"

# force push branch
$ git push --force-with-lease origin update-docs

[tank3a]

I guess I changed.. or maybe messed up, but now the test is passed! Thank you!