Fix breadcrumb_link.dashboard spanish translate

Resources/translations/SonataAdminBundle.es.xliff

@@ -179,7 +179,7 @@
                 <target>Elemento eliminado satisfactoriamente.</target>
             </trans-unit>
             <trans-unit id="link_breadcrumb_dashboard">
-                <source>Panel principal</source>
+                <source>breadcrumb.link_dashboard</source>
                 <target><![CDATA[<i class="fa fa-home"></i>]]></target>
             </trans-unit>
             <trans-unit id="title_delete">