Did you forget the part where they suspended the entire program because of the media uproar? Why would it still be in the SLA or on the privacy page anymore if it’s not being used?
If it isn't being used, then why are contractors still listening to recordings?
The fact of the matter is, there is NO mention of Siri recordings in the current Privacy Policy nor in the iOS 12 Software License Agreement.
https://www.apple.com/legal/privacy/en-ww/
https://www.apple.com/legal/sla/docs/iOS12.pdf