Update index.html (#1144)

Author: sy-records

Diff for: index.html

@@ -24,7 +24,7 @@
         '.*?/awesome': 'https://raw.githubusercontent.com/docsifyjs/awesome-docsify/master/README.md',
         '.*?/changelog': 'https://raw.githubusercontent.com/docsifyjs/docsify/master/CHANGELOG.md',
         '/.*/_navbar.md': '/_navbar.md',
-        '/zh-cn/(.*)': 'https://raw.githubusercontent.com/docsifyjs/docs-zh/master/$1',
+        '/zh-cn/(.*)': 'https://cdn.jsdelivr.net/gh/docsifyjs/docs-zh/$1',
         '/de-de/(.*)': 'https://raw.githubusercontent.com/docsifyjs/docs-de/master/$1',
         '/ru/(.*)': 'https://raw.githubusercontent.com/docsifyjs/docs-ru/master/$1',
         '/es/(.*)': 'https://raw.githubusercontent.com/docsifyjs/docs-es/master/$1'