Updated free-courses-en.md (#8424)

Added a free course from Udemy on Node.js

courses/free-courses-en.md

@@ -769,6 +769,7 @@
 * [Node.js Basics](https://www.youtube.com/playlist?list=PLqq-6Pq4lTTa-d0iZg41U2RDqECol9C5B) - Java Brains (YouTube)
 * [Node.js Crash Course Tutorial](https://www.youtube.com/playlist?list=PL4cUxeGkcC9jsz4LDYc6kv3ymONOKxwBU) - The Net Ninja
 * [Node.js Full Course for Beginners \| Complete All-in-One Tutorial \| 7 Hours](https://www.youtube.com/watch?v=f2EqECiTBL8) - Dave Gray
+* [Node.js Introductory Course for Absolute Beginners](https://www.udemy.com/course/nodejs-introductory-course-for-absolute-beginners) - Nodejs Academy (Udemy)
 * [Node.js Tutorial for Beginners](https://www.youtube.com/playlist?list=PLsyeobzWxl7occsESx2X1E2R2Uw5wCoeG) - Telusko (YouTube)
 * [Node.js Tutorial for Beginners: Learn Node in 1 Hour](https://www.youtube.com/watch?v=TlB_eWDSMt4) - Moshfegh Hamedani (Programming with Mosh)