added ai-usage tag

Author: AbdullahBell

articles/private-link/cost-optimization.md

@@ -7,6 +7,7 @@ ms.service: azure-private-link
 ms.topic: concept-article
 ms.date: 08/28/2025
 ms.author: abell
+ai-usage: ai-assisted
 # Customer intent: As a cloud architect or IT administrator, I want to optimize costs for Azure Private Link, so that I can maintain secure private connectivity while controlling expenses and maximizing return on investment.
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