Fix typo

Signed-off-by: j-svensmark <[email protected]>

notebooks/5_advanced.ipynb

@@ -670,7 +670,7 @@
     "\n",
     "* Similarly, the list of items to recommend can also be specified using the `item_list` argument in the **score** function.\n",
     "* Items that are not in the `item_list` will be removed from the recommender and items in the `item_list` not in the recommender will be added. \n",
-    "* Same as above, if untrained (cold) items are added to the recommender, warm start can be used with the corresponding `item features`."
+    "* Same as above, if untrained (cold) items are added to the recommender, warm start can be used with the corresponding `item_features`."
    ]
   },
   {