CloudFormation fails to create the launch config for the ASG

After creating a new CF stack by following the [steps](https://github.com/aws-samples/aws-codedeploy-github-actions-deployment?tab=readme-ov-file#deploying-the-cloudformation-template) detailed in the README, creating _WebappLaunchConfig_ fails with the following error:

> Resource handler returned message: "The Launch Configuration creation operation is not available in your account. Use launch templates to create configuration templates for your Auto Scaling groups. (Service: AutoScaling, Status Code: 400, Request ID: d2598c07-34db-4d46-bf20-670d9e73629d)"

As per the [auto-scaling user guide](https://docs.aws.amazon.com/autoscaling/ec2/userguide/launch-configurations.html), launch configs cannot be created anymore with new EC2 instance types or by new accounts, and migrating to launch templates is the recommended way going forward.