updates for workshop ami and requirements

[zackbradys]

Issue #69 and N/A:

• Updated AWS AMI to Rancher Manager v2.7.9, Rancher Kubernetes Engine 2 v1.25.15, and Cert-Manager v1.13.2
  • Tested and verified comparability with the workshop environment on two accounts in us-east-1 and us-west-2
• Updated Workshop Requirements to add clarity for users at AWS Events and Outside AWS Events
  • Feedback received from users at the most recent AWS Event
• Minor updates to AWS CloudFormation template to have the same formatting and configuration
  • Linted and formatted (with prettier) CloudFormation template

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[zackbradys]

Hey @evdevr, please review/comment/approve!