fix unstranslated title

Author: leonardolara

appendices/migration84/new-features.xml

@@ -173,7 +173,7 @@ $object = $reflector->newLazyGhost($initializer);
   </sect3>
 
   <sect3 xml:id="migration84.new-features.core.debug-closure">
-   <title>Improved Debugging Info for <classname>Closure</classname></title>
+   <title>Informação de Depuração Melhorada para <classname>Closure</classname></title>
 
    <!-- TODO: expand and examples? -->
    <simpara>