Vrog add ruby course pt br (#3818)

* Added ruby course pt_BR

* Fixed in alphabetical order
Co-authored-by: NVictor Rafael <dev.04@conlifebank.com.br>

free-courses-pt_BR.md

@@ -196,6 +196,7 @@
 * [Curso de Ruby on Rails para Iniciantes](https://www.youtube.com/playlist?list=PLe3LRfCs4go-mkvHRMSXEOG-HDbzesyaP) - Jackson Pires (YouTube)
 * [Ruby on Rails 5 na Prática](https://www.udemy.com/ruby-on-rails-5-na-pratica/) - Bruno Paulino (Udemy)
 * [Ruby Para Iniciantes](https://www.udemy.com/ruby-para-iniciantes/) - Bruno Paulino (Udemy)
+* [Ruby Puro](https://onebitcode.com/course/ruby-puro/) - One Bit Code (Site One Bit Code)
 
 
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