fix link

Author: mrbullwinkle

articles/ai-services/openai/concepts/provisioned-migration.md

@@ -79,7 +79,7 @@ We also recommend that customers using commitments now create their deployments
 See the following links for more information. The guidance for reservations and commitments is the same:
 
 * [Capacity Transparency](#self-service-migration)
-* [Sizing reservations](../how-to/provisioned-throughput-onboarding.md#important-sizing-azure-openai-provisioned-reservations)
+* [Sizing reservations](../how-to/provisioned-throughput-onboarding.md#important-sizing-azure-openai-provisioned--global-provisioned-reservations)
 
 ## New hourly reservation payment model