Adding (CC BY) licenses in GO (PT-BR) section (#11682)

* Adding (CC BY) licenses

CC BY licenses added in GO (PT-BR) section.

* Spacing correction

* Spacing correction

* Remove version

Co-authored-by: Eric Hellman <eric@hellman.net>

---------

Co-authored-by: Eric Hellman <eric@hellman.net>

books/free-programming-books-pt_BR.md

@@ -217,10 +217,10 @@
 ### GO
 
 * [Aprenda Go com Testes](https://larien.gitbook.io/aprenda-go-com-testes) - Lauren Ferreira
-* [Construindo Aplicações Web em Golang](https://astaxie.gitbooks.io/build-web-application-with-golang/content/pt-br/) - astaxie
-* [Go - hands on](https://github.com/go-br/estudos)
+* [Construindo Aplicações Web em Golang](https://astaxie.gitbooks.io/build-web-application-with-golang/content/pt-br/) - astaxie (CC BY-SA)
+* [Go - hands on](https://github.com/go-br/estudos) (CC BY-SA)
 * [Go Lang - A linguagem do Google](https://www.ime.usp.br/~gold/cursos/2015/MAC5742/reports/GoLang.pdf) - Suelen Goularte Carvalho (PDF)
-* [Go por Exemplo](http://goporexemplo.golangbr.org) - Mark McGranaghan, Jeremy Ashkenas, golangbr, Daniela Tamy Iwassa (HTML)
+* [Go por Exemplo](http://goporexemplo.golangbr.org) - Mark McGranaghan, Jeremy Ashkenas, golangbr, Daniela Tamy Iwassa (HTML) (CC BY)
 
 
 ### Haskell