feat: :sparkles: new course shell script (#8970)

* feat: :sparkles: new course shell script

* Update courses/free-courses-pt_BR.md

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

* sort

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>
Co-authored-by: Eric Hellman <eric@hellman.net>

courses/free-courses-pt_BR.md

@@ -366,6 +366,7 @@
 ### Shell
 
 * [Conceitos de Programação em Shell Script](https://www.udemy.com/conceitos-de-programacao-em-shell-script/) - TemWeb (Udemy)
+* [Curso de Shell Scripting - Programação no Linux](https://www.youtube.com/playlist?list=PLucm8g_ezqNrYgjXC8_CgbvHbvI7dDfhs) - Bóson Treinamentos
 * [Curso Shell GNU](https://www.youtube.com/playlist?list=PLXoSGejyuQGqJEEyo2fY3SA-QCKlF2rxO) - debxp (YouTube)