Add NextJS course by Net Ninja (#11574)

* Add NextJS course by Net Ninja

* lint fix

courses/free-courses-en.md

@@ -1085,6 +1085,7 @@
 * [Next.js 14 Beginner Roadmap & Course](https://www.youtube.com/playlist?list=PLrnPJCHvNZuBH7pax5p75JDNblo8rpl00) - Coding in Flow
 * [Next.js for Beginners - Full Course](https://www.youtube.com/watch?v=1WmNXEVia8I) - Kapehe (FreeCodeCamp)
 * [Next.js Tutorial for Beginners](https://www.youtube.com/playlist?list=PLC3y8-rFHvwgC9mj0qv972IO5DmD-H0ZH) - Codevolution
+* [Next.js Tutorial for Beginners](https://www.youtube.com/playlist?list=PL4cUxeGkcC9g9gP2onazU5-2M-AzA8eBw) - Net Ninja
 * [Next.js Tutorials for Beginners](https://www.youtube.com/playlist?list=PL0Zuz27SZ-6Pk-QJIdGd1tGZEzy9RTgtj) - Dave Gray