Added a link to a free course on Vue.js 3 (#6402)

* Appended to the NodeJS section

Added a link to a free ExpressJS course

* Updated NodeJS section

Moved the link up to ensure proper alphabetical order

* Updated the NodeJS section

Added Udemy as the location for the ExpressJS Fundamentals course by Patrick Schroeder

* Updated Vue.js section

Added a link to a free Vue.js 3 course on Youtube by 'The Net Ninja'

* Updated Vue.js section

Updated title of the course.

courses/free-courses-en.md

@@ -593,6 +593,7 @@
 * [Vue Router for Everyone](https://vueschool.io/courses/vue-router-for-everyone)
 * [Vue.js Components Fundamentals](https://vueschool.io/courses/vuejs-components-fundamentals)
 * [Vue.js Fundamentals](https://vueschool.io/courses/vuejs-fundamentals)
+* [Vue.js Tutorial](https://www.youtube.com/playlist?list=PL4cUxeGkcC9hYYGbV60Vq3IXYNfDk8At1) - The Net Ninja (Youtube)
 * [Vuex for Everyone](https://vueschool.io/courses/vuex-for-everyone)