Update javadoc plugin

git-svn-id: https://svn.apache.org/repos/asf/geronimo/xbean/trunk@1859769 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 1df07eb..3834837 100644
--- a/pom.xml
+++ b/pom.xml
@@ -461,7 +461,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>2.5</version>
+                <version>2.9</version>
                 <configuration>
                     <minmemory>128m</minmemory>
                     <maxmemory>512</maxmemory>