Add Cinema 4D to glTF exporter list.

docs/manual/en/introduction/Loading-3D-models.html

@@ -63,6 +63,7 @@
 		<li><a href="https://www.foundry.com/products/modo" target="_blank" rel="noopener">Modo</a> by Foundry</li>
 		<li><a href="https://www.marmoset.co/toolbag/" target="_blank" rel="noopener">Toolbag</a> by Marmoset</li>
 		<li><a href="https://www.sidefx.com/products/houdini/" target="_blank" rel="noopener">Houdini</a> by SideFX</li>
+		<li><a href="https://labs.maxon.net/?p=3360" target="_blank" rel="noopener">Cinema 4D</a> by MAXON</li>
 		<li>&hellip;and <a href="https://github.com/khronosgroup/gltf#gltf-tools" target="_blank" rel="noopener">many more</a></li>
 	</ul>