add documentation link

Author: fedorov

notebooks/getting_started/part2_searching_basics.ipynb

@@ -27,12 +27,12 @@
         "\n",
         "In [Part 1](https://github.com/ImagingDataCommons/IDC-Examples/blob/master/notebooks/getting_started/part1_prerequisites.ipynb) of this tutorial series, you learned how to complete the prerequisites that are required to be able to search IDC data using GCP BigQuery.\n",
         "\n",
-        "In this notebook you will be introduced into how IDC organizes the metadata accompanying images available in IDC, and how that metadata can be used to define subsets of data.\n",
+        "In this notebook you will be introduced into how IDC organizes the metadata accompanying images available in IDC, and how that metadata can be used to define subsets of data. This documentation page complements this notebook with the more detailed discussion of the metadata organization in IDC: https://learn.canceridc.dev/data/organization-of-data/files-and-metadata.\n",
         "\n",
         "---\n",
         "Initial version: Nov 2022\n",
         "\n",
-        "Updated:\n"
+        "Updated: Oct 2023\n"
       ]
     },
     {