AWS rtb-fabric documentation change
Summary
Migrated documentation from IoT Fleet Hub to RTB Fabric, updated IAM integration details including ABAC support removal and service-linked roles addition
Security assessment
The change removes ABAC (tag-based access control) support which reduces granular permission options, but this is a feature change rather than a vulnerability fix. It adds documentation about service-linked roles (a security feature) which improves role management security. No concrete evidence of addressing existing vulnerabilities.