Add Korean free Haskell lecture (#6292)

* Add Korean free Haskell lecture

* Fix lint error

* Fix line blank line error

* Fix line blank line error2

* Update list order

* Delete unnecessary white space

* Update author of lecture

* Move courses to appropriate file

* Update courses/free-courses-ko.md

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

books/free-programming-books-ko.md

@@ -212,4 +212,3 @@
 
 * [번역 Unicode 이모티콘에 얽힌 이것저것 (이모티콘 표준과 프로그래밍 핸들링)](http://pluu.github.io/blog/android/2020/01/11/unicode-emoji/)
 
-

courses/free-courses-ko.md

@@ -11,6 +11,7 @@
 * [Flutter](#flutter)
 * [Git](#git)
 * [Go](#go)
+* [Haskell](#haskell)
 * [Introduction](#introduction)
 * [iOS](#ios)
 * [Java](#java)
@@ -112,6 +113,11 @@
 * [컴맹을 위한 프로그래밍 기초 강좌](https://www.youtube.com/playlist?list=PLy-g2fnSzUTAaDcLW7hpq0e8Jlt7Zfgd6)
 
 
+### Haskell
+
+* [하스켈 프로그래밍: 프로그래밍과 유형 이론(Type Theory)](https://www.youtube.com/playlist?list=PL5aSjzJqCaPaoi8yC2w549FsVgvXW5xFW) - Gyesik Lee «liga nega» (YouTube)
+
+
 ### Introduction
 
 * [컴퓨터 프로그래밍](http://www.kocw.net/home/search/kemView.do?kemId=1322410)