🌐 [i18n-KO] Translated `roberta.md` to Korean (#37069)
* docs: ko: roberta.md
* fix: manual edits
* Apply suggestions from code review
Co-authored-by: Woojun Jung <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: YONGSANG <71686691+4N3MONE@users.noreply.github.com>
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Co-authored-by: Woojun Jung <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: YONGSANG <71686691+4N3MONE@users.noreply.github.com>
