Add Programming for Kids book by Ei Maung (#11216)

* Add Programming for Kids by Ei Maung

* Update free-programming-books-my.md

Change the category from programming for kids to programming

books/free-programming-books-my.md

@@ -7,6 +7,7 @@
 * [JavaScript](#javascript)
 * [Linux](#linux)
 * [PHP](#php)
+* [Programming](#programming)
 * [Python](#python)
 * [Web Development](#web-development)
 
@@ -51,6 +52,11 @@
 * [PHP - On Point](https://eimaung.com/php/) - Ei Maung (PDF)
 
 
+### Programming
+
+* [Programming for Kids](https://eimaung.com/kids/) - Ei Maung (PDF, EPUB)
+
+
 ### Python
 
 * [Programming Basic For Beginner](http://books.saturngod.net/programming_basic/) - Saturngod