update train_queue wording

Co-authored-by: Adrien Lavoillotte <adrien.lavoillotte@dataiku.com>

Author: exil

dataikuapi/dss/ml.py

@@ -3330,7 +3330,7 @@ def delete_trained_model(self, model_id):
 
     def train_queue(self):
         """
-        Trains a queue
+        Trains this MLTask's queue
 
         :return: A dict including the next sessionID to be trained in the queue
         :rtype dict