🌐 Modify the description of zh - Traditional Chinese (#10889)

Co-authored-by: Sebastián Ramírez <tiangolo@gmail.com>

docs/en/mkdocs.yml

@@ -304,7 +304,7 @@ extra:
   - link: /yo/
     name: yo - Yorùbá
   - link: /zh/
-    name: zh - 汉语
+    name: zh - 简体中文
   - link: /zh-hant/
     name: zh-hant - 繁體中文
   - link: /em/

docs/language_names.yml

@@ -178,6 +178,6 @@ xh: isiXhosa
 yi: ייִדיש
 yo: Yorùbá
 za: Saɯ cueŋƅ
-zh: 汉语
+zh: 简体中文
 zh-hant: 繁體中文
 zu: isiZulu