🌐 [i18n-KO] Translated tasks/image_captioning.mdx to Korean (#22943)

docs: ko: tasks/image_captioning.mdx

Co-authored-by: Hyeonseo Yun <0525_hhgus@naver.com>
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: Wonhyeong Seo <wonhseo@kakao.com>
Co-authored-by: Gabriel Yang <gabrielwithhappy@gmail.com>
Co-authored-by: Nayeon Han <nayeon2.han@gmail.com>
Co-authored-by: Kihoon Son <75935546+kihoon71@users.noreply.github.com>
Co-authored-by: Hyeonseo Yun <0525yhs@gmail.com>

docs/source/ko/_toctree.yml

@@ -89,8 +89,8 @@
       title: (번역중) Depth estimation
     title: (번역중) 컴퓨터 비전
   - sections:
-    - local: in_translation
-      title: (번역중) Image captioning
+    - local: tasks/image_captioning
+      title: 이미지 캡셔닝
     - local: in_translation
       title: (번역중) Document Question Answering
     title: (번역중) 멀티모달