improve: [exampleSite] Set docs type as docs_list

Author: manid2

exampleSite/content/docs/_index.md

@@ -3,4 +3,7 @@ title = "Docs"
 description = "Documents collection"
 date = "2023-07-15"
 author = "Mani Kumar"
+
+[cascade]
+  list_type = "docs_list"
 +++