Update the code example

Author: panychek

src/LazyListenerAggregate.php

@@ -21,10 +21,11 @@
  * Usage is:
  *
  * <code>
- * $events->attachAggregate(new LazyListenerAggregate(
+ * $aggregate = new LazyListenerAggregate(
  *     $lazyEventListenersOrDefinitions,
  *     $container
- * ));
+ * );
+ * $aggregate->attach($events);
  * </code>
  */
 class LazyListenerAggregate implements ListenerAggregateInterface