Added resources for MySQL in Bengali (#5927)

* Added new resources for MySQL in Bengali

* Sorted lines alphabetically

* Added vertical tab scape and fixed instructor name for sohidul islam

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

* Added instructor name for "live project"

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

* Fix names and add platform

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

books/free-programming-books-bl.md

@@ -17,6 +17,7 @@
 * [Kotlin](#kotlin)
 * [Machine Learning](#machine-learning)
 * [Misc](#misc)
+* [MySQL](#mysql)
 * [NodeJS](#nodejs)
 * [OOP](#oop)
 * [PHP](#php)
@@ -142,6 +143,14 @@
 * [ডেভসংকেত: বাংলা চিটশিটের ভান্ডার](https://devsonket.com) - Devsonket Team
 
 
+### MySQL
+
+* [Bangla MySQL Database Tutorials](https://www.youtube.com/playlist?list=PLTydW-y9HsbQ2ztoaLBJTd4wwjc_oqWx4) - Delowar Jahan Imran, Training with Live Project (YouTube)
+* [mysql bangla tutorial \| Mysql Database \| HSC,CSE, Anyone](https://www.youtube.com/playlist?list=PLbC4KRSNcMnqp4x6XstgFCVi6XVu37t99) - Sohidul Islam, Learn Hunter (YouTube)
+* [MySql Database Bangla Tutorial Beginner to Advanced](https://www.youtube.com/playlist?list=PLH246IZCIBeA4h1R6fdgK06kj9lMb3joi) - Shoaib Hossain, Soft-All (YouTube)
+* [MySQL Database Bangla Tutorials (HSC student / Anyone)](https://www.youtube.com/playlist?list=PLgH5QX0i9K3qLcx9DvVDWmNJ7riPvxzCD) - Anisul Islam (YouTube)
+
+
 ### PHP
 
 * [PHP All You Need To Know](https://www.youtube.com/playlist?list=PL_XxuZqN0xVCFLIrGA1GaxacvPTDQcsMV) - Stack Learner