Added courses Elixir PT-BR (#8155)

* Added courses Elixir PT-BR

* correction number of blank lines between heading and section

* lines correction

* add list youtube and remove index line

* * index

* index alphabetical

* Update courses/free-courses-pt_BR.md

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

* Update courses/free-courses-pt_BR.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-pt_BR.md

@@ -8,6 +8,7 @@
 * [Database](#database)
 * [Delphi](#delphi)
 * [Docker](#docker)
+* [Elixir](#elixir)
 * [Flutter](#flutter)
 * [Git](#git)
 * [Go](#go)
@@ -94,6 +95,12 @@
 * [Curso de Docker para iniciantes - aprenda Docker em 1 hora](https://www.youtube.com/watch?v=np_vyd7QlXk) - Matheus Battisti
 
 
+### Elixir
+
+* [Curso de Elixir](https://www.youtube.com/playlist?list=PLydk1OOOmzo8VBeU334j4R4WvSByRNpXR) - ELLY ACADEMY (YouTube)
+* [Curso de Elixir Alquimia](https://www.youtube.com/playlist?list=PLv3nyCBtlWP8I9rknIrfcJWrO05yEzknD) - Alquimia Stone
+
+
 ### Flutter
 
 * [Criando seu primeiro App com Flutter](https://app.balta.io/courses/7184) - Andre Baltieri (balta.io)