[AWS::APS::AnomalyDetector] - [Docs] - Alias max length differs from API doc

### Name of the resource

Other

### Resource name

AWS::APS::AnomalyDetector

### Reference Link

https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-aps-anomalydetector.html

### Details

[CloudFormation resource docs](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-aps-anomalydetector.html) state `Maximum: 128`.

[API docs](https://docs.aws.amazon.com/prometheus/latest/APIReference/API_CreateAnomalyDetector.html) however state `Maximum length of 64.`

Start with the CloudFormation resource documentation and the linked AWS Prometheus CreateAnomalyDetector API documentation. Verify the conflicting Alias maximum lengths, then update the CloudFormation documentation to match the authoritative value; the work is done when the resource and API references agree.

Written by the indexing model from the issue text.