feat(translations): enable Chinese Simplified on website

website/languages.js

@@ -172,12 +172,10 @@ const languages = [
     tag: 'vi',
   },
   {
-    enabled: false,
+    enabled: true,
     name: '中文',
-    tag: 'zh-Hans',
-  },
-  {
-    enabled: false, name: '繁體中文', tag: 'zh-Hant'
+    tag: 'zh-CN',
   },
+  {enabled: false, name: '繁體中文', tag: 'zh-TW'},
 ];
 module.exports = languages;