ConceptNet 5.8.1 AMI root volume snapshot should be public to enable copying the AMI to other regions.

[ami-0f0c8ef6acb420f69](https://us-east-1.console.aws.amazon.com/ec2/v2/home?region=us-east-1#ImageDetails:imageId=ami-0f0c8ef6acb420f69) is public. However the underlying root volume snapshot (`snap-07e1b254eeea34200`) is not. This means we cannot create a copy of the AMI in another region.