add bangla wordpress theme development course link in courses section (#8866)

courses/free-courses-bn.md

@@ -264,4 +264,5 @@ Shikkhangon BD
 * [WordPress Bangla Tutorial](https://www.youtube.com/playlist?list=PLm64fbD5Onxti7DiUkX3UX3P2tuiEw30E) - Moshiur
 * [WordPress Customization Bangla Tutorial](https://www.youtube.com/playlist?list=PLbC4KRSNcMno7NzhTgGhoZtRjLiHUo8m4) - Learn Hunter
 * [Wordpress Bangla Tutorial Course for beginner to advanced level](https://www.youtube.com/playlist?list=PLeCz-UdZ0uzQVPdQN-mWnz8896BdYMqAf) - Freelancer Mannan
+* [WordPress Theme Development Tutorial Bangla ](https://www.youtube.com/playlist?list=PLSNRR4BKcowD6A-U_ll9ayJWqOEz3XD8l) - Procoder BD