🌐 [i18n-KO] Translated `guides/upload.md` to Korean (#2139)
* docs: ko: upload.md
* feat: [nmt|manual] draft
* fix: manual edits
* Apply suggestions from code review
Co-authored-by: SeungAhSon <gongsoonyee@gmail.com>
* fix: Apply suggestions from code review
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Co-authored-by: SeungAhSon <gongsoonyee@gmail.com>
Co-authored-by: Lucain <lucainp@gmail.com>