Update README.md

Author: nmagee

ec2/cloudformation/README.md

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 # CloudFormation Stacks
 
-[![EC2 Instance](../../images/launch-stack.png)](https://us-east-1.console.aws.amazon.com/cloudformation/home?region=us-east-1#/stacks/quickcreate?stackName=Ubuntu-24.04LTS-Instance&templateURL=https://sds-cloud-snippets.s3.amazonaws.com/ec2/cloudformation/ec2-with-bootstrapping.yaml) - Ubuntu 24.04LTS instance with boto3. (Default user `ubuntu`) [Template](ec2-with-bootstrapping.yaml)
+[![EC2 Instance](../../images/launch-stack.png)](https://us-east-1.console.aws.amazon.com/cloudformation/home?region=us-east-1#/stacks/quickcreate?stackName=Ubuntu-24LTS-Instance&templateURL=https://sds-cloud-snippets.s3.amazonaws.com/ec2/cloudformation/ec2-with-bootstrapping.yaml) - Ubuntu 24.04LTS instance with boto3. (Default user `ubuntu`) [Template](ec2-with-bootstrapping.yaml)
 
 [![EC2 Instance for FastAPI](../../images/launch-stack.png)](https://us-east-1.console.aws.amazon.com/cloudformation/home?region=us-east-1#/stacks/quickcreate?stackName=ds2002-fastapi-instance&templateURL=https://sds-cloud-snippets.s3.amazonaws.com/ec2/cloudformation/ec2-ds2002-base.yaml) - Ubuntu 22.04LTS instance for FastAPI. (Default user `ubuntu`) [Template](ec2-ds2002-base.yaml) >> [FastAPI-Demo Source](https://github.com/nmagee/fastapi-demo)