Step Functions State Machine with DefinitionSubstitutions

This template creates a Step Functions state machine with definition substitutions. The state machine is named 'HelloWorld-StateMachine' and has a state machine type of 'STANDARD'. The definition of the state machine is specified using an S3 location for a JSON file, which includes a single 'Task' state named 'HelloWorld' that invokes a Lambda function. The state machine is associated with an IAM role.