switch to latest decoration XML Schema

Author: stefanseifert

src/site/site.xml

@@ -20,9 +20,9 @@
   -->
 
 <project name="CONGA AEM Plugin"
-  xmlns="http://maven.apache.org/DECORATION/1.3.0"
+  xmlns="http://maven.apache.org/DECORATION/1.8.0"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.3.0 http://maven.apache.org/xsd/decoration-1.3.0.xsd">
+  xsi:schemaLocation="http://maven.apache.org/DECORATION/1.8.0 http://maven.apache.org/xsd/decoration-1.8.0.xsd">
 
   <bannerRight>
     <name><![CDATA[<img src="https://devops.wcm.io/conga/images/conga.png" style="height:120px"/>]]></name>