classref: Sync with current master branch (2ac2db8de)

classes/class_navigationobstacle3d.rst

@@ -23,6 +23,13 @@ Description
 
 Obstacles **don't** change the resulting path from the pathfinding, they only affect the navigation agent movement in a radius. Therefore, using obstacles for the static walls in your level won't work because those walls don't exist in the pathfinding. The navigation agent will be pushed in a semi-random direction away while moving inside that radius. Obstacles are intended as a last resort option for constantly moving objects that cannot be (re)baked to a navigation mesh efficiently.
 
+.. rst-class:: classref-introduction-group
+
+Tutorials
+---------
+
+- :doc:`Using NavigationObstacles <../tutorials/navigation/navigation_using_navigationobstacles>`
+
 .. rst-class:: classref-reftable-group
 
 Properties