docs: fix author

Author: mlopezFC

src/main/java/com/flowingcode/vaadin/addons/gridexporter/ExcelInputStreamFactory.java

@@ -60,7 +60,7 @@
 import org.slf4j.LoggerFactory;
 
 /**
- * @author mlope
+ * @author mlopez
  */
 @SuppressWarnings("serial")
 class ExcelInputStreamFactory<T> extends BaseInputStreamFactory<T> {