Update sm_xgboost_ca_housing_apprunner_model_hosting.ipynb

Updated to specify root access requirement for the notebook.

Author: gv-tech

notebooks/sm_xgboost_ca_housing_apprunner_model_hosting.ipynb

@@ -37,6 +37,7 @@
     "* At the time of writing this notebook, AWS App Runner supported only public endpoints.\n",
     "* If you intend to deploy this to Production with access security, then you have to build the authentication and authorization layers in the container prior to letting the call go to the inference script.  This is not covered in this notebook.\n",
     "* This notebook will create resources in the same AWS account and in the same region where this notebook is running.\n",
+    "* Users of this notebook require `root` access to install/update required software.  This is set by default when you create the notebook.  For more info, refer [here](https://docs.aws.amazon.com/sagemaker/latest/dg/nbi-root-access.html).\n",
     "\n",
     "**Table of Contents:**\n",
     "\n",
@@ -341,6 +342,8 @@
    "source": [
     "###  C. Check and configure security permissions <a id='Check%20and%20configure%20security%20permissions'></a>\n",
     "\n",
+    "Users of this notebook require `root` access to install/update required software.  This is set by default when you create the notebook.  For more info, refer [here](https://docs.aws.amazon.com/sagemaker/latest/dg/nbi-root-access.html).\n",
+    "\n",
     "This notebook uses the IAM role attached to the underlying notebook instance.  This role should have the following permissions,\n",
     "\n",
     "1. Full access to the S3 bucket that will be used to store training and output data.\n",