Updates a client node for the org sending the request that has the given @client_node_sid and @schedule_scenario_sid. All of the entity's parameters that are not desired to be updated must be filled with their current values. The @schedule_scenario_sid must be the original for this client node since it cannot be changed. The @member fields will be ignored since those cannot be updated by this method and must be updated by their respective update methods. Errors:
grpc.Invalid: one or more fields in the @node have invalid values.
grpc.Internal: error occurs when updating the client @node.
grpc.NotFound: entry to be updated doesn't exist, or the given @parent_sid (call_center_node_sid) belongs to a different scenario than this @node.