Fix typo in the scenegraph feature doc

doc/scenegraph.dox

@@ -144,7 +144,7 @@ class for more detailed information:
     2D transformations with separate translation, rotation and scaling. Usable
     for scenes with animation tracks that control these properties separately.
 -   @ref SceneGraph::BasicTranslationRotationScalingTransformation3D "SceneGraph::TranslationRotationScalingTransformation3D" ---
-    2D transformations with separate translation, rotation and scaling. Usable
+    3D transformations with separate translation, rotation and scaling. Usable
     for scenes with animation tracks that control these properties separately.
 -   @ref SceneGraph::TranslationTransformation "SceneGraph::TranslationTransformation*D" ---
     Just 2D/3D translation (no rotation, scaling or anything else)