[misc] Use the same version for all Maven Archetype modules

xwiki-rendering-archetype-macro/pom.xml

@@ -88,7 +88,7 @@
       <extension>
         <groupId>org.apache.maven.archetype</groupId>
         <artifactId>archetype-packaging</artifactId>
-        <version>2.1</version>
+        <version>${maven.archetype.version}</version>
       </extension>
     </extensions>
     <plugins>