Merge branch 'release/3.8' of https://github.com/couchbase/docs-sdk-java into release/3.8

Author: RichardSmedley

modules/concept-docs/pages/data-model.adoc

@@ -1,7 +1,7 @@
 = Data Model
 :description: Couchbase's use of JSON as a storage format allows powerful search and query over documents.
 :nav-title: Data Model
-:page-topic-type: concept
+:page-toclevels: 2
 :page-aliases: ROOT:datastructures
 
 include::project-docs:partial$attributes.adoc[]