Fix invalid inheritance of `OccluderInstance3D`

doc/classes/OccluderInstance3D.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<class name="OccluderInstance3D" inherits="Node3D" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
+<class name="OccluderInstance3D" inherits="VisualInstance3D" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
 	<brief_description>
 		Provides occlusion culling for 3D nodes, which improves performance in closed areas.
 	</brief_description>

scene/3d/occluder_instance_3d.h

@@ -161,7 +161,7 @@ public:
 };
 
 class OccluderInstance3D : public VisualInstance3D {
-	GDCLASS(OccluderInstance3D, Node3D);
+	GDCLASS(OccluderInstance3D, VisualInstance3D);
 
 private:
 	Ref<Occluder3D> occluder;