`azure-health-insights-radiologyinsights` Readme Issue

[NanaXiong00]

Section link:

Reason: Missing the link.

Suggestion:
Add link: https://learn.microsoft.com/en-us/rest/api/cognitiveservices/healthinsights/radiology-insights?view=rest-cognitiveservices-healthinsights-2023-09-01-preview

@sandeep-sen, @joshfree and @tomsft for notification.

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @azmonapplicationinsights.