Add Web Development course (#9644)

* Add new SQL series

* Update free-courses-vi.md

minor adjustment

* add web development course

courses/free-courses-vi.md

@@ -33,6 +33,7 @@
 * [TypeScript](#typescript)
     * [Angular](#angular)
 * [Unity](#unity)
+* [Web Development](#web-development)
 * [Wordpress](#wordpress)
 * [XML](#xml)
 
@@ -301,6 +302,11 @@
 * [Lập Trình Game 2D Trên Unity3D](https://www.youtube.com/playlist?list=PLl-dkipSQUGcQQgvh9j8a75Sz4zx9vWo8) - U DEV
 
 
+### Web Development
+
+* [Lập Trình Web Cơ Bản](https://www.youtube.com/playlist?list=PLiyVagO7GfBE3_b-4lJEVk7iq1pHQ-xcM) - J2Team
+
+
 ### Wordpress
 
 * [WordPress Cơ Bản](https://www.youtube.com/playlist?list=PLl4nkmb3a8w3qzoFaXLsPohofWUMTOHBU) - Thạch Phạm