🌐 [i18n-KO] Translated model_doc/time_series_transformer.md to Korean (#33596)

* docs: ko: model_doc/time_series_transformer.md

* fix: resolve suggestions

Co-authored-by: Chaewon Song <chaewon1019@ewhain.net>
Co-authored-by: Ahnjj_DEV <ahnjj.dev@gmail.com>

* fix: resolve suggestions

* fix: resolve suggestions

* fix: resolve suggestions

Co-authored-by: Ahnjj_DEV <ahnjj.dev@gmail.com>

---------

Co-authored-by: Chaewon Song <chaewon1019@ewhain.net>
Co-authored-by: Ahnjj_DEV <ahnjj.dev@gmail.com>

docs/source/ko/_toctree.yml

@@ -765,8 +765,8 @@
         title: (번역중) Informer
       - local: model_doc/patchtsmixer
         title: PatchTSMixer
-      - local: in_translation
-        title: (번역중) Time Series Transformer
+      - local: model_doc/time_series_transformer
+        title: 시계열 트랜스포머
       title: 시계열 모델
     - isExpanded: false
       sections: