Fix link to Teams repo per suggestion from PR validation

Author: aspreadbury

articles/communications-gateway/overview.md

@@ -12,7 +12,7 @@ ms.date: 10/22/2024
 # What is Azure Communications Gateway?
 
 > [!IMPORTANT]
-> The Azure Communications Gateway service will retire on October 30, 2025. To prevent any service disruption, please transition to another [Microsoft Teams Direct Routing certified Session Border Controller (SBC)](https://learn.microsoft.com/microsoftteams/direct-routing-border-controllers) solution before October 30, 2025.
+> The Azure Communications Gateway service will retire on October 30, 2025. To prevent any service disruption, please transition to another [Microsoft Teams Direct Routing certified Session Border Controller (SBC)](/microsoftteams/direct-routing-border-controllers) solution before October 30, 2025.
 
 Azure Communications Gateway provides quick, reliable and secure integration with multiple services for telecommunications operators: