add diff url for version 23

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/trunk@1434742 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: 916f2fb35a7d28b788cca57cf9d002b4d426532a
  1. src/
  2. pom.xml
  3. site-pom.xml