Website: Link to the Chinese translation

Closes #921

docs/sidebars.js

@@ -1,9 +1,19 @@
 // @ts-check
 
+const { CHINESE_URL } = require('./constants');
+
 /** @type {import('@docusaurus/plugin-content-docs').SidebarsConfig} */
 const sidebars = {
   tutorialSidebar: [
-    { type: 'autogenerated', dirName: '.' },
+    {
+      type: 'autogenerated',
+      dirName: '.'
+    },
+    {
+      type: 'link',
+      label: 'Chinese',
+      href: CHINESE_URL
+    },
     {
       type: 'html',
       value: '<div id="sidebar-ads"></div>'