Fix BurstFilter javadoc. (#552)

diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/BurstFilter.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/BurstFilter.java
index 47b98ca..5623c15 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/BurstFilter.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/BurstFilter.java
@@ -46,9 +46,9 @@
  * <code>
  * &lt;Console name="console"&gt;<br>
  * &nbsp;&lt;PatternLayout pattern="%-5p %d{dd-MMM-yyyy HH:mm:ss} %x %t %m%n"/&gt;<br>
- * &nbsp;&lt;filters&gt;<br>
- * &nbsp;&nbsp;&lt;Burst level="INFO" rate="16" maxBurst="100"/&gt;<br>
- * &nbsp;&lt;/filters&gt;<br>
+ * &nbsp;&lt;Filters&gt;<br>
+ * &nbsp;&nbsp;&lt;BurstFilter level="INFO" rate="16" maxBurst="100"/&gt;<br>
+ * &nbsp;&lt;/Filters&gt;<br>
  * &lt;/Console&gt;<br>
  * </code><br>
  */