feat: add the first Sass portuguese course (#10254)

* feat: add the first Sass portuguese course

* fix url of portuguese sass course

books/free-programming-books-pt_BR.md

@@ -223,6 +223,7 @@
 ### HTML and CSS
 
 * [Apostila de HTML](https://www.telecom.uff.br/pet/petws/downloads/apostilas/HTML.pdf) - Robertha Pereira Pedroso (PDF)
+* [Curso SASS](https://github.com/amandavilela/curso-sass) - Amanda Vilela
 * [Desenvolvimento Web com HTML, CSS e JavaScript](https://www.caelum.com.br/apostila-html-css-javascript/) - Caelum
 * [Dive Into HTML5](http://diveintohtml5.com.br) - Mark Pilgrim
 * [Estruturando o HTML com CSS](http://pt-br.learnlayout.com)