CloudFormation Specifications
- Update CloudFormation specs to `49.0.0` (pull [2178](https://github.com/aws-cloudformation/cfn-lint/pull/2178))
- Expand `StatefulResources` to include `AWS::OpenSearchService::Domain` (pull [2179](https://github.com/aws-cloudformation/cfn-lint/pull/2179))
- Add `AWS::EKS::Cluster.ClusterSecurityGroupId` to `GetAtt` list of `AWS::EC2::SecurityGroup.NameOrGroupId` (pull [2177](https://github.com/aws-cloudformation/cfn-lint/pull/2177))