Update LOCALIZATION_CONTRIBUTORS

[yuppjun]

Added a new contributor (Junyoung Choi) under Korean translation crew.

Summary

Related #<replace_me_with_related_issue_number>

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[SooluThomas]

Thank you for your interest to contribute. As mentioned in README, we are no longer supporting translations for the application docs.