Minor fix in spanish translation for logging

Author: emacarron

src/site/es/xdoc/logging.xml

@@ -68,6 +68,7 @@
       </p>      
       <source><![CDATA[org.apache.ibatis.logging.LogFactory.useSlf4jLogging();
 org.apache.ibatis.logging.LogFactory.useLog4JLogging();
+org.apache.ibatis.logging.LogFactory.useLog4J2Logging();
 org.apache.ibatis.logging.LogFactory.useJdkLogging();
 org.apache.ibatis.logging.LogFactory.useCommonsLogging();
 org.apache.ibatis.logging.LogFactory.useStdOutLogging();]]></source>