Adding course of deep learning (#6569)

* Adding course of deep learning

* adding link in tab machine learning

* removing (Em português)

courses/free-courses-pt_BR.md

@@ -206,6 +206,7 @@
 
 ### Machine Learning
 
+* [Curso Deep Learning](https://www.youtube.com/playlist?list=PLSZEVLiOtIgF19_cPrvhJC2bWn-dUh1zB) - Deep Learning Brasil (YouTube)
 * [Machine Learning e Data Science: O Guia para Iniciantes](https://www.udemy.com/course/guia-iniciantes-machine-learning-data-science/) - Jones Granatyr (Udemy)
 * [Neural Networks e Deep Learning para Leigos: Sem Mistérios!](https://www.udemy.com/course/neural-networks-e-deep-learnig-para-leigos/) - Fernando Amaral (Udemy)