[MPOM-106] updated maven-assembly-plugin version to 2.6

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/trunk@1743282 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/asf/pom.xml b/asf/pom.xml
index dffad45..c61e10f 100644
--- a/asf/pom.xml
+++ b/asf/pom.xml
@@ -119,7 +119,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-assembly-plugin</artifactId>
-          <version>2.5.5</version>
+          <version>2.6</version>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>