[KARAF-2055] Upgrade to Apache POM 12

git-svn-id: https://svn.apache.org/repos/asf/karaf/webconsole/trunk@1420326 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index d3dbeff..9e3f661 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,8 @@
     <parent>
         <groupId>org.apache</groupId>
         <artifactId>apache</artifactId>
-        <version>11</version>
+        <version>12</version>
+        <relativePath />
     </parent>
 
     <groupId>org.apache.karaf</groupId>