updated parent pom to released version

git-svn-id: https://svn.apache.org/repos/asf/maven/skins/trunk@1768241 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/maven-default-skin/pom.xml b/maven-default-skin/pom.xml
index 3e08597..996150f 100644
--- a/maven-default-skin/pom.xml
+++ b/maven-default-skin/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.apache.maven.skins</groupId>
     <artifactId>maven-skins</artifactId>
-    <version>30-SNAPSHOT</version>
+    <version>30</version>
     <relativePath>../../pom/maven/maven-skins/pom.xml</relativePath>
   </parent>