Set version to 10.6.0

Author: asf-rm

pom.xml

@@ -145,7 +145,7 @@
   <properties>
 
     <!-- project version -->
-    <revision>10.6.0-SNAPSHOT</revision>
+    <revision>10.6.0</revision>
 
     <!-- `project.build.outputTimestamp` is required to be present for reproducible builds.
          We actually inherit one from the `org.apache:apache` parent.