clean up header

Author: Gang Fu

notebooks/idc_on_aws/idc-on-aws-tutorial.ipynb

@@ -21,7 +21,7 @@
     "\n",
     "## Pre-requisites \n",
     "    \n",
-    "1. Download the [CloudFormation tempalte](https://github.com/aws-solutions-library-samples/guidance-for-multi-modal-data-analysis-with-aws-health-and-ml-services/blob/main/cfn_template) and deploy the template to create [Amazon SageMaker Domain](https://aws.amazon.com/sagemaker/) and necessary [Amazon IAM](https://aws.amazon.com/iam/) roles\n",
+    "1. Download the [CloudFormation template](https://github.com/aws-solutions-library-samples/guidance-for-multi-modal-data-analysis-with-aws-health-and-ml-services/blob/main/cfn_template) and deploy the template to create [Amazon SageMaker Domain](https://aws.amazon.com/sagemaker/) and necessary [Amazon IAM](https://aws.amazon.com/iam/) roles\n",
     "\n",
     "<img src=\"img/deploy_template.png\" width=\"888\">\n",
     "\n",