Adding Machine Learning workshop to README (#265)

* Added Machine Learning workshop to root README.

* Clarifying overview

Co-authored-by: Mark Kazzaz <[email protected]>
Co-authored-by: Collin Forrester <[email protected]>

Author: 3 people

README.md

@@ -18,9 +18,11 @@ This repository contains a collection of workshops and other hands on content th
 
 - [**Security**](https://github.com/aws-samples/aws-serverless-security-workshop) - This workshop shows you techniques to secure a serverless application built with AWS Lambda, Amazon API Gateway and RDS Aurora. We will cover AWS services and features you can leverage to improve the security of a serverless applications in 5 domains: identity & access management, infrastructure, data, code, and logging & monitoring.
 
+- [**Machine Learning**](MachineLearning) - This workshop shows you how to collect, process, and join disparate data sources using AWS Lambda and Amazon Athena. This data can be used to train a machine learning model using Amazon SageMaker. With the trained model hosted on Amazon S3, you will build a serverless API using Amazon API Gateway and AWS Lambda to predict the probability that a unicorn will request service after completing a ride.
+
 
 # Third Party Workshops
 
 The following workshops are created and maintained by third parties and explore a variety of other topics and tools related to serverless development on AWS.
 
-- [**HERE Geocoding and Routing Extensions**](https://github.com/heremaps/devrel-workshops/tree/master/aws-serverless) - These extensions to the [**Web Application**](WebApplication) and [**Data Processing**](https://dataprocessing.wildrydes.com) workshops walk through how to enhance the base applications with geocoding and advanced routing features. You'll see how to launch applications from the AWS Serverless Application Repository and integrate these components into the existing architectures. You'll need to complete the primary Web Application or Data Processing workshop from this repository before starting the extensions.
+- [**HERE Geocoding and Routing Extensions**](https://github.com/heremaps/devrel-workshops/tree/master/aws-serverless) - These extensions to the [**Web Application**](WebApplication) and [**Data Processing**](https://dataprocessing.wildrydes.com) workshops walk through how to enhance the base applications with geocoding and advanced routing features. You'll see how to launch applications from the AWS Serverless Application Repository and integrate these components into the existing architectures. You'll need to complete the primary Web Application or Data Processing workshop from this repository before starting the extensions.