Add link to MeshDataTool API in tutorial (#3817)

tutorials/content/procedural_geometry/meshdatatool.rst

@@ -3,7 +3,7 @@
 Using the MeshDataTool
 ======================
 
-The MeshDataTool is not used to generate geometry. But it is helpful for dynamically altering geometry, for example
+The :ref:`MeshDataTool <class_meshdatatool>` is not used to generate geometry. But it is helpful for dynamically altering geometry, for example
 if you want to write a script to tessellate, simplify, or deform meshes.
 
 The MeshDataTool is not as fast as altering arrays directly using ArrayMesh. However, it provides more information