update slim tutorial link

Author: fedorov

notebooks/viewers_deployment/slim_Firebase_deployment.ipynb

@@ -19,7 +19,7 @@
         "# Slim Deployment with Firebase and Google Cloud\n",
         "\n",
         "This notebook complements the tutorial available in this document:\n",
-        "[Google Doc: Slim Deployment with Firebase and Google Cloud](https://docs.google.com/document/d/1857jb_wKHqyGOd49UirujDDrFE8fUPfimZPXJ19zSF4/edit?usp=sharing).\n",
+        "[Google Doc: Slim Deployment with Firebase and Google Cloud](https://tinyurl.com/idc-slim-gcp).\n",
         "You need to complete the steps discussed in that document before proceeding with this notebook! Please use the document above for providing feedback or asking questions.\n",
         "\n"
       ]
@@ -551,4 +551,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 0
-}
+}