Ensure auto minor version upgrade is enabled for AWS Database Migration Service (DMS) instances

Minor version updates are not configured, this can probably impact security best practices.

In AWS Console -

1. Sign in to the AWS Console and go to the AWS DMS Console.
2. Select Replication Instances in the navigation pane.
3. Select the instance you want to modify.
4. Modify auto minor version upgrade and select apply changes immediately.

In Terraform -

1. In the aws_dms_replication_instance resource, set the auto_minor_version_upgrade field to true.

References:
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_ReplicationInstance.Modifying.html
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/dms_replication_instance