Update outline

Author: gavinjwlaws

README.md

@@ -7,12 +7,17 @@
 
 [EMR Setup](./0-emr-setup.ipynb)
 
-## Work with EMR
+## Working with Spark on EMR
 
 1. [Develop Apache Spark with EMR Notebook](./1-1-develop-spark-with-emr.ipynb)
 1. [Execute Apache Spark jobs](./1-2-execute-spark-jobs.ipynb)
 1. [AWS SDK for Python (Boto3)](./1-3-aws-sdk-for-python.ipynb)
 
+## Working with Hudi on EMR
+
+1. [Copy-on-Write](./1-copy-on-write.ipynb)
+1. [Merge-on-Read](./2-merge-on-read.ipynb)
+
 ## References
 
 - [EMR-ETL workshop](https://emr-etl.workshop.aws/)