Scratch Programming in Bangla course added (#7611)

* Scratch Programming in Bangla course added

* Order of list reversed alphabetidally

As you requested, order of my list has been reversed.

courses/free-courses-bn.md

@@ -27,6 +27,7 @@
 * [PHP](#php)
 * [Programming paradigms](#programming-paradigms)
 * [Python](#python)
+* [Scratch](#scratch)
 * [TypeScript](#typescript)
 
 
@@ -208,6 +209,13 @@
 * [Python tutorials by Zulkarnine](https://www.youtube.com/playlist?list=PLV3rqOvr9vgkW7U-kdxtUBx74ICpw94k8) - Zulkarnine Mahmud
 
 
+### Scratch
+
+* [Scratch Programming](https://youtube.com/playlist?list=PLtEypp6e7UDBfNhRt9x3N89mJKl0PztHH) - bdOSN
+* [Scratch Programming for Kids Bangla](https://youtube.com/playlist?list=PLkWIEmwZeYzqpPfmJdlXKgjxrCu47Gfaz) - Opportunities For Kids
+* [Scratch Programming in Bangla](https://youtube.com/playlist?list=PLym69wpbTIIEkUnqkOznZfQU6lRxebpO3) - Tamim Shahriar
+
+
 ### TypeScript
 
 * [TypeScript Advance Course](https://www.youtube.com/playlist?list=PLEYpvDF6qy8aesJ9a6lREDE4lcIA0iHMR) - Foyzul Karim