CloudFormation Specifications
- Update CloudFormation specs to `170.0.0` (pull [3149](https://github.com/aws-cloudformation/cfn-lint/pull/3149))
Fixes
- Only pick up `.json` files when using registry schemas (pull [3150](https://github.com/aws-cloudformation/cfn-lint/pull/3150))
- Update IAM policy validation to not allow `Action` and `NotAction` (pull [3145](https://github.com/aws-cloudformation/cfn-lint/pull/3145))
- Update IAM policy validation to not allow `Principal` and `NotPrincipal` (pull [3145](https://github.com/aws-cloudformation/cfn-lint/pull/3145))
- Update IAM policy validation to not allow `Resource` and `NotResource` (pull [3145](https://github.com/aws-cloudformation/cfn-lint/pull/3145))