Update Creative Commons

Author: rougeth

src/templates/base.html

@@ -213,13 +213,13 @@
       {% endif %}
       <p class="col-lg-12 text-center">
         <a href="{% url 'opendata' %}"><img src="{{ STATIC_URL }}img/opendata3.png"/></a>
-        <a href="http://creativecommons.org/licenses/by-sa/3.0/br/"><img src="{{ STATIC_URL }}img/cc_by_sa.png"/></a>
+        <a href="http://creativecommons.org/licenses/by-sa/4.0/deed.pt_BR"><img src="{{ STATIC_URL }}img/cc_by_sa.png"/></a>
       </p>
       <p class="col-lg-12 text-center">
         {% trans "The contents of this site is published under license" %}:
         <br>
-        <a href="http://creativecommons.org/licenses/by-sa/3.0/br/">
-          {% trans "Creative Commons 3.0 Brasil - Atribuir Fonte - Compartilhar Igual" %}.
+        <a href="http://creativecommons.org/licenses/by-sa/4.0/deed.pt_BR">
+          {% trans "Creative Commons 4.0 Brasil - Atribuir Fonte - Compartilhar Igual" %}.
         </a>
       </p>
     </div>