fix link the_scene_graph.adoc

docs/modules/ROOT/pages/jme3/the_scene_graph.adoc

@@ -143,7 +143,7 @@ a| The rootNode, the guiNode, an audioNode, a custom grouping node for a vehicle
 
 == How to Use This Knowledge?
 
-Before you start creating your game, you should plan your scene graph: Which Nodes and Geometries will you need? Complete the xref:tutorials:beginner.adoc[Beginner tutorials] to learn how to load and create Spatials, how to lay out a scene by attaching, detaching, and transforming Spatials, and how to add interaction and effects to a game.
+Before you start creating your game, you should plan your scene graph: Which Nodes and Geometries will you need? Complete the xref:tutorials:beginner/beginner.adoc[Beginner tutorials] to learn how to load and create Spatials, how to lay out a scene by attaching, detaching, and transforming Spatials, and how to add interaction and effects to a game.
 
 //The <<jme3#documentation-for-intermediate-users#,intermediate and advanced documentation>> gives you more details on how to put all the parts together to create an awesome 3D game in Java!