Adding some Golang PT-BR free courses (#3615)

* Adding some Golang PT-BR free courses

* Fixing Alphabetical Order

free-courses-pt_BR.md

@@ -77,7 +77,10 @@
 
 ### Go
 
+* [Aprenda Go / Golang (Curso Tutorial de Programação)](https://www.youtube.com/playlist?list=PLUbb2i4BuuzCX8CLeArvx663_0a_hSguW) - NBK Mundo Tech (YouTube)
 * [Curso de Introdução a Linguagem Go (Golang)](https://www.youtube.com/playlist?list=PLXFk6ROPeWoAvLMyJ_PPfu8oF0-N_NgEI) - EuProgramador (YouTube)
+* [Go – Aprenda a Programar (Curso)](https://www.youtube.com/playlist?list=PLCKpcjBB_VlBsxJ9IseNxFllf-UFEXOdg) - Ellen Körbes (YouTube)
+* [Programar em Go](https://www.youtube.com/playlist?list=PLV5KfEYwFC1G3r7XlgVCE5HVdVKj-UdRa) - Caffeine Algorithm (YouTube)
 
 
 ### Gulp