fix portuguese book link

Uses the new link to the book in portuguese.

Author: Vitor

html/index.html

@@ -139,7 +139,7 @@ <h3>Second Edition</h3>
   <ul class=translations>
     <li><a href="https://rabahboudia.gitbooks.io/arabic-eloquent-js/content/index.html">عَرَبِيّ‎ (Arabic)</a></li>
     <li><a href="https://to6esko.github.io/">Български (Bulgarian)</a></li>
-    <li><a href="https://braziljs.github.io/eloquente-javascript/">Português (Portuguese)</a></li>
+    <li><a href="https://github.com/braziljs/eloquente-javascript">Português (Portuguese)</a></li>
     <li><a href="https://karmazzin.gitbooks.io/eloquentjavascript_ru/content/">Русский (Russian)</a></li>
   </ul>