What's Changed
* Add `uniqueKeys` for `Sid` in IAM policies by kddejong in https://github.com/aws-cloudformation/cfn-lint/pull/3982
* Create ipv4 and ipv6 network formats by kddejong in https://github.com/aws-cloudformation/cfn-lint/pull/3981
* Add rule [E3059](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3059) to validate if `AWS::EC2::Subnet` CIDRs are in a `AWS::EC2::VPC` by kddejong in https://github.com/aws-cloudformation/cfn-lint/pull/3985
* Add rule [E3060](https://github.com/aws-cloudformation/cfn-python-lint/blob/main/docs/rules.md#E3060) to validate if `AWS::EC2::Subnet` CIDRs overlap with each other by kddejong in https://github.com/aws-cloudformation/cfn-lint/pull/3985
* Update CloudFormation schemas to `2025-03-04` by github-actions in https://github.com/aws-cloudformation/cfn-lint/pull/3980
**Full Changelog**: https://github.com/aws-cloudformation/cfn-lint/compare/v1.27.0...v1.28.0