Add nomadcoders' Go for beginners class (#6288)

* add nomadcoders for Go

* email address required
Co-authored-by: NImVector <59611597+LuigiImVector@users.noreply.github.com>

* use real course name, add lecturer
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* sort lexicographically
Co-authored-by: NImVector <59611597+LuigiImVector@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

courses/free-courses-ko.md

@@ -108,6 +108,7 @@
 
 ### Go
 
+* [쉽고 빠른 Go 시작하기](https://nomadcoders.co/go-for-beginners) - Nicolás Serrano Arévalo (Nomad Coders) (email address *required*)
 * [컴맹을 위한 프로그래밍 기초 강좌](https://www.youtube.com/playlist?list=PLy-g2fnSzUTAaDcLW7hpq0e8Jlt7Zfgd6)