add module to antoral.yml

docs/antora.yml

@@ -4,3 +4,4 @@ version: master
 start_page: ROOT:documentation.adoc
 nav:
 - modules/ROOT/nav.adoc
+- modules/tutorials/nav.adoc

docs/modules/tutorials/pages/nav.adoc

@@ -1,5 +1,5 @@
 * Tutorials
-** Beginner
+** xref:beginner.adoc[Beginner tutorials]
 *** xref:hello_simpleapplication.adoc[Hello SimpleApplication]
 *** xref:hello_node.adoc[Hello Node]
 *** xref:hello_asset.adoc[Hello Asset]