Update provisioned-reservation-update.md

updated link to AOAI Reservation Transition doc from commerce

Author: sydneemayers

articles/ai-services/openai/concepts/provisioned-reservation-update.md

@@ -67,5 +67,5 @@ The migration with downtime approach involves migrating existing provisioned dep
 - Once your new deployment has succeeded, you may resume inference traffic on the new global or data zone deployment.
 
 ## How do I migrate my existing Azure Reservation to the new Azure Reservation products?
-Azure Reservations for Azure OpenAI Service provisioned offers are specific to the provisioned deployment type. If the Azure Reservation purchased does not match the provisioned deployment type, the deployment will default to the hourly payment model. If you choose to migrate to global or data zone provisioned deployments, you may need to purchase a new Azure Reservation for these deployments to support additional discounts. For more information on how to purchase a new Azure Reservation or make changes to an existing Azure Reservation, see the [Azure Reservations for Azure OpenAI Service Provisioned guidance](https://aka.ms/oai/docs/ptum-reservations).
+Azure Reservations for Azure OpenAI Service provisioned offers are specific to the provisioned deployment type. If the Azure Reservation purchased does not match the provisioned deployment type, the deployment will default to the hourly payment model. If you choose to migrate to global or data zone provisioned deployments, you may need to purchase a new Azure Reservation for these deployments to support additional discounts. For more information on how to purchase a new Azure Reservation or make changes to an existing Azure Reservation, see the [Azure Reservations for Azure OpenAI Service Provisioned guidance](https://aka.ms/aoai/reservation-transition).