[i18n-KO] Translated video_classification.mdx to Korean (#23026)

* task/video_classification translated
Co-Authored-By: Hyeonseo Yun <0525_hhgus@naver.com>
Co-Authored-By: Gabriel Yang <gabrielwithhappy@gmail.com>
Co-Authored-By: Sohyun Sim <96299403+sim-so@users.noreply.github.com>
Co-Authored-By: Nayeon Han <nayeon2.han@gmail.com>
Co-Authored-By: Wonhyeong Seo <wonhseo@kakao.com>
Co-Authored-By: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>

* Update docs/source/ko/tasks/video_classification.mdx
Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>

* Apply suggestions from code review
Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>
Co-authored-by: Hyeonseo Yun <0525yhs@gmail.com>
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: Gabriel Yang <gabrielwithhappy@gmail.com>

* Update video_classification.mdx

* Update _toctree.yml

* Update _toctree.yml

* Update _toctree.yml

* Update _toctree.yml

---------
Co-authored-by: Hyeonseo Yun <0525_hhgus@naver.com>
Co-authored-by: Gabriel Yang <gabrielwithhappy@gmail.com>
Co-authored-by: Sohyun Sim <96299403+sim-so@users.noreply.github.com>
Co-authored-by: Nayeon Han <nayeon2.han@gmail.com>
Co-authored-by: Wonhyeong Seo <wonhseo@kakao.com>
Co-authored-by: Jungnerd <46880056+jungnerd@users.noreply.github.com>
Co-authored-by: Hyeonseo Yun <0525yhs@gmail.com>

docs/source/ko/_toctree.yml

@@ -54,8 +54,8 @@
         title: 이미지 분류
       - local: in_translation
         title: (번역중) Semantic segmentation
-      - local: in_translation
-        title: (번역중) Video classification
+      - local: tasks/video_classification
+        title: 영상 분류
       - local: in_translation
         title: (번역중) Object detection
       - local: tasks/zero_shot_object_detection