Update README.md

Author: andywick-aws

aws_sra_examples/solutions/ec2/ec2_default_ebs_encryption/README.md

@@ -35,7 +35,7 @@ Encryption by default has no effect on existing EBS volumes or snapshots.
 
 ### 1.0 Control Tower Management Account <!-- omit in toc -->
 
-#### 1.1 AWS CloudFormation <!-- omit in toc -->
+#### 1.1 AWS CloudFormation<!-- omit in toc -->
 
 - All resources are deployed via AWS CloudFormation as a `StackSet` and `Stack Instance` within the management account or a CloudFormation `Stack` within a specific account.
 - The [Customizations for AWS Control Tower](https://aws.amazon.com/solutions/implementations/customizations-for-aws-control-tower/) solution deploys all templates as a CloudFormation `StackSet`.