🌐[i18n-KO] Translated performance.md to Korean (#24883)

* dos: ko: performance.md

* feat: chatgpt draft

* fix: manual edits

* fix: manual edits

* Update docs/source/ko/performance.md

Co-authored-by: Kihoon Son <75935546+kihoon71@users.noreply.github.com>

* Update docs/source/ko/performance.md

---------

Co-authored-by: Kihoon Son <75935546+kihoon71@users.noreply.github.com>

docs/source/ko/_toctree.yml

@@ -105,8 +105,8 @@
       title: 문제 해결
   title: (번역중) 개발자 가이드
 - sections:
-    - local: in_translation
-      title: (번역중) Overview
+    - local: performance
+      title: 성능 및 확장성
     - local: in_translation
       title: (번역중) Training on one GPU
     - local: in_translation