🌐 [i18n-KO] Translated `perf_train_cpu_many.md` to Korean (#24923)
* docs: ko: perf_train_cpu_many.md
* feat: chatgpt draft
* fix: manual edits
* fix: resolve suggestions
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>
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Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>