use last site plugin SNAPSHOT for maven 3 build

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@989285 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index e318cde..0fe3b87 100644
--- a/pom.xml
+++ b/pom.xml
@@ -353,7 +353,7 @@
         </file>
       </activation>
       <properties>
-        <sitePluginVersion>3.0-beta-1</sitePluginVersion>
+        <sitePluginVersion>3.0-beta-2-SNAPSHOT</sitePluginVersion>
       </properties>
     </profile>