fix/word-error-base (#3480)

I've been analyzing the site for untranslated words and I noticed this punctuation/word error.

src/templates/pt/base.html

@@ -83,7 +83,7 @@
 {% block reviewed_and_analyzed_by_after %}{% endblock %}
 {% block analysis_and_editing_by_after %}{% endblock %}
 
-{% block date_published %}Data de publicação:: {% endblock %}
+{% block date_published %}Data de publicação: {% endblock %}
 {% block date_updated %}Data atualizada: {% endblock %}
 
 {% block unedited %}[Não editado]{% endblock %}