Adding app runner to AWS compliance program

Background - Customers may use any AWS service in an account designated as a HIPAA account, but they should only process, store, and transmit protected health information (PHI) in the HIPAA-eligible services defined in the Business Associate Addendum (BAA).
Ref. - https://aws.amazon.com/compliance/hipaa-compliance/

**This is a feature request for adding App runner to compliance scope.**
[AWS Services in Scope by Compliance Program](https://aws.amazon.com/compliance/services-in-scope/)