Added a Tailwind CSS youtube course by Dave gray (#10675)

* Added HTML, CSS resource playlist link

* Added HTML, CSS resource/course playlist link

* Added HTML, CSS resource/course hindi playlist link

* Added HTML, CSS resource/course hindi playlist link

* Update free-courses-hi.md

* Update free-courses-hi.md

* Added a Tailwind CSS course and it's youtube link

courses/free-courses-en.md

@@ -820,6 +820,7 @@
 * [Responsive Web Design with HTML5 and CSS3 - Advanced](https://www.udemy.com/course/responsive-web-design-with-html5-and-css3-advanced/) - Udemy
 * [Sass Tutorial - Build Your Own CSS Library](https://www.youtube.com/playlist?list=PL4cUxeGkcC9jxJX7vojNVK-o8ubDZEcNb) - The Net Ninja
 * [Structuring the web with HTML](https://developer.mozilla.org/en-US/docs/Learn/HTML)
+* [Tailwind CSS Full Course for Beginners](https://www.youtube.com/watch?v=lCxcTsOHrjo) - Dave Gray
 * [Tailwind CSS Tutorial](https://youtube.com/playlist?list=PL4cUxeGkcC9gpXORlEHjc5bgnIi5HEGhw) - The Net Ninja
 * [TailwindCSS Tutorial](https://www.youtube.com/playlist?list=PLFHz2csJcgk8lgiRDB7FdsXVr4xy6jE8K) - Code With Dary
 * [Web Development By Doing: HTML / CSS From Scratch](https://www.udemy.com/course/web-development-learn-by-doing-html5-css3-from-scratch-introductory/) - Udemy