🌐 [i18n-KO] Translated training.mdx to Korean (#22670)

translate training doc to Korean

docs/source/ko/_toctree.yml

@@ -15,8 +15,8 @@
     title: 자동 클래스로 사전 학습된 인스턴스 로드하기
   - local: in_translation
     title: (번역중) Preprocess
-  - local: in_translation
-    title: (번역중) Fine-tune a pretrained model
+  - local: training
+    title: 사전 학습된 모델 미세 조정하기
   - local: in_translation
     title: (번역중) Distributed training with 🤗 Accelerate
   - local: in_translation
@@ -146,7 +146,7 @@
     - local: in_translation
       title: (번역중) Checks on a Pull Request
     title: (번역중) 기여하기
-  - local: in_translation
+  - local: notebooks
     title: (번역중) 🤗 Transformers Notebooks
   - local: in_translation
     title: (번역중) Community resources