docs: update schema docstrings to latest version

arena/objects/pcd_model.py

@@ -4,7 +4,8 @@ class PcdModel(Object):
     """
     PcdModel object class to manage its properties in the ARENA: Load a PCD model. Format: <https://pointclouds.org/documentation/tutorials/index.html> Point Clouds. See guidance to store paths under <https://docs.arenaxr.org/content/interface/filestore.html> ARENA File Store, CDN, or DropBox.
 
-    :param str pointColor: Color of the points. Defaults to '#7f7f7f' (optional)
+    :param float opacity: Opacity of all points. Defaults to '1' (optional)
+    :param str pointColor: Color of the points. (optional)
     :param float pointSize: Size of the points. Defaults to '0.01' (optional)
     :param str url: Use File Store paths under 'store/users/username', see CDN and other storage options in the description above. (optional)
     """