Added some necessary youtube playlist of Bengali Language (#7002)

* Added some necessary Youtube playlist of Bengali Language

Bumps PR EbookFoundation/free-programming-books#5760
Cherry picked from 66914d4450

Co-authored-by: noobSrijon <srijonkumar18@gmail.com>

* lint: alphabetize Python list

* complete resources authoring

Address suggestion made at https://github.com/EbookFoundation/free-programming-books/pull/5760#discussion_r738833002

Co-authored-by: noobSrijon <srijonkumar18@gmail.com>

courses/free-courses-bn.md

@@ -183,8 +183,10 @@
 
 ### Python
 
+* [Bangla Python Tutorial for Beginners](https://www.youtube.com/playlist?list=PLlBKlxyCgmsCYJLq9qc5QzaU-oBFJN79B) - Niamul Hasan (StartBit)
 * [Python All You Need To Know](https://www.youtube.com/playlist?list=PL_XxuZqN0xVCH8fRfZ8sUuKEQQYIFMjtJ) - Stack Learner
 * [Python Bangla Tutorials for Beginners](https://www.youtube.com/playlist?list=PLgH5QX0i9K3rz5XqMsTk41_j15_6682BN) - Anisul Islam
+* [Python tutorials by Zulkarnine](https://www.youtube.com/playlist?list=PLV3rqOvr9vgkW7U-kdxtUBx74ICpw94k8) - Zulkarnine Mahmud
 
 
 ### TypeScript