Fix link to introduction (#3860)

Fix link to introduction by guiding you directly to the "learn" page.

Author: Tony Edgecombe

locale/en/docs/guides/getting-started-guide.md

@@ -28,5 +28,5 @@ server.listen(port, hostname, () => {
 Now, run your web server using `node app.js`. Visit `http://localhost:3000` and
 you will see a message saying "Hello World".
 
-Refer to the [Introduction to Node.js](https://nodejs.dev/) for a more
+Refer to the [Introduction to Node.js](https://nodejs.dev/learn) for a more
 comprehensive guide to getting started with Node.js.

locale/zh-cn/docs/guides/getting-started-guide.md

@@ -26,3 +26,5 @@ server.listen(port, hostname, () => {
 ```
 
 然后使用 `node app.js` 运行程序，访问 `http://localhost:3000`，你就会看到一个消息，写着“Hello World”。
+
+请查阅 [Node.js 介绍](https://nodejs.dev/learn)，这是一个对于 Node.js 起步完整的指南。