Updated cable_cell constructor parameter order (#2236)

doc/python/cable_cell.rst

@@ -60,10 +60,10 @@ Cable cells
 
         :param morphology: the morphology of the cell
         :type morphology: :py:class:`morphology` or :py:class:`segment_tree`
-        :param labels: dictionary of labeled regions and locsets
-        :type labels: :py:class:`label_dict`
         :param decorations: the decorations on the cell
         :type decorations: :py:class:`decor`
+        :param labels: dictionary of labeled regions and locsets
+        :type labels: :py:class:`label_dict`
 
     .. method:: placed_lid_range(index)