Fixup table of contents from last commit.
- [Requirements](#requirements)
- [Optional](#optional)
- [Prerequisites](#prerequisites)
- - [Bootstrapping AWS Identity and Access Management with CloudFormation](#bootstrapping-aws-identity-and-access-management-with-cloudformation)
- [Installing clusterawsadm](#installing-clusterawsadm)
+ - [Bootstrapping AWS Identity and Access Management with CloudFormation](#bootstrapping-aws-identity-and-access-management-with-clusterawsadm)
- [SSH Key pair](#ssh-key-pair)
- [Create a new key pair](#create-a-new-key-pair)
- [Using an existing key](#using-an-existing-key)
