fix ibeta link

Author: Nabil Lathiff

articles/ai-services/computer-vision/overview-identity.md

@@ -88,7 +88,7 @@ The goal of liveness detection is to ensure that the system is interacting with
 
 The liveness detection solution successfully defends against a variety of spoof types ranging from paper printouts, 2d/3d masks, and spoof presentations on phones and laptops. Liveness detection is an active area of research, with continuous improvements being made to counteract increasingly sophisticated spoofing attacks over time. Continuous improvements will be rolled out to the client and the service components over time as the overall solution gets more robust to new types of attacks.
 
-Our liveness detection solution meets [iBeta Level 1 and 2 ISO/IEC 30107-3](https://www.ibeta.com/iso-30107-3-presentation-attack-detection-confirmation-letters/#letters) compliance.
+Our liveness detection solution meets [iBeta Level 1 and 2 ISO/IEC 30107-3](https://www.ibeta.com/wp-content/uploads/2023/11/230622-Microsoft-PAD-Level-2-Confirmation-Letter.pdf) compliance.
 
 Tutorials
 - [Face liveness Tutorial](Tutorials/liveness.md)