Fix overwrite sample

Author: nanaeaubry

samples/05_content_publishers/overwriting_feature_layers.ipynb

@@ -330,7 +330,8 @@
    "source": [
     "# add the csv as an item\n",
     "item_prop = {'title':'USA Capitals spreadsheet_' + str(now)}\n",
-    "csv_item = gis.content.add(item_properties=item_prop, data=my_csv)\n",
+    "root_folder = gis.content.folders.get()\n",
+    "csv_item = root_folder.add(item_properties=item_prop, file=my_csv)\n",
     "csv_item"
    ]
   },
@@ -474,7 +475,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "map1.add_layer(cities_item)"
+    "map1.content.add(cities_item)"
    ]
   },
   {
@@ -978,7 +979,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "map2.add_layer(cities_item)"
+    "map2.content.add(cities_item)"
    ]
   },
   {