Update region-optimization.md

Updated the ms.subservice and freshness date details

Author: PreetiOne

articles/cost-management-billing/manage/region-optimization.md

@@ -4,9 +4,9 @@ description: Learn about the region optimization policy and how it might affect
 author: preetione
 ms.reviewer: presharm
 ms.service: cost-management-billing
-ms.subservice: common
+ms.subservice: billing
 ms.topic: conceptual
-ms.date: 01/22/2025
+ms.date: 07/10/2025
 ms.author: presharm
 ---
 
@@ -24,4 +24,4 @@ If you have a suitable business reason and the region where you want to deploy r
 
 ## Related content
 
-- Learn more about [Billing and subscriptions](index.yml).
+- Learn more about [Billing and subscriptions](index.yml).