🌐 [i18n-KO] Translated `bertology.mdx` to Korean (#23968)
* docs: ko: `bertology.mdx`
* feat: nmt draft
* fix: manual edits
* fix: resolve suggestions
Co-authored-by: Hyeonseo Yun <0525yhs@gmail.com>
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Co-authored-by: Hyeonseo Yun <0525yhs@gmail.com>
