add missing hyperlink

Author: jyaistMap

guide/10-mapping-and-visualization/managing-offline-map-areas.ipynb

@@ -1289,7 +1289,7 @@
    "source": [
     "When you create an offline map area, the data for the specified extent is bundled into one or many packages for downloading depending upon the types of layers in the _web map_. _Feature Layers_ are packaged into mobile geodatabases, while _tile layers_ and _vector tile layers_ are bundled into tile packages and vector tile packages, respectively. See the [Create and manager offline map areas documentation](https://doc.arcgis.com/en/arcgis-online/manage-data/take-maps-offline.htm#ESRI_SECTION1_8C6055E984D34AF4A25B989DDCAACF87) for details.\n",
     "\n",
-    "The packages created for a `Map Area` item share a relationship with the item. The relationship type is an `Area2Package` relation with a forward direction. See the [Relationship types]() documentation for a comprehensive list of possible relations between items. Any _item_ has the [`related_items()`](/python/api-reference/arcgis.gis.toc.html#arcgis.gis.Item.related_items) method from which you can retrieve the items that participate in the specific relationship type:"
+    "The packages created for a `Map Area` item share a relationship with the item. The relationship type is an `Area2Package` relation with a forward direction. See the [Relationship types](/rest/users-groups-and-items/relationship-types.htm) documentation for a comprehensive list of possible relations between items. Any _item_ has the [`related_items()`](/python/api-reference/arcgis.gis.toc.html#arcgis.gis.Item.related_items) method from which you can retrieve the items that participate in the specific relationship type:"
    ]
   },
   {