Added wordpress courses (#8706)

* updated free-courses-bn.md

I have added 3 playlists for WordPress Bangla tutorials.

* Update free-courses-bn.md

* Update free-courses-bn.md

* Update courses/free-courses-bn.md

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

courses/free-courses-bn.md

@@ -30,6 +30,7 @@
 * [Scratch](#scratch)
 * [Shell scripting](#shell-scripting)
 * [TypeScript](#typescript)
+* [WordPress](#wordpress)
 
 
 ### Android
@@ -239,3 +240,10 @@ Shikkhangon BD
 * [TypeScript Bangla ( বাংলা ) Tutorial Series](https://youtube.com/playlist?list=PLHiZ4m8vCp9PgOOjdyNpc6AoBmKNrp_u3) - Learn with Sumit
 * [typescript full course in bangla](https://youtube.com/playlist?list=PLgH5QX0i9K3rXq_1OgVmjaEJJ1akJQgPq) - Anisul Islam
 
+
+### WordPress
+
+* [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
+