Update author and date in index.yml

Author: Nicholak-MS

articles/cost-management-billing/manage/index.yml

@@ -8,10 +8,10 @@ metadata:
   ms.service: cost-management-billing
   ms.subservice: billing
   ms.topic: landing-page
-  author: PreetiSGit
+  author: Nicholak-MS
   ms.author: nicholak
   ms.reviewer: nicholak
-  ms.date: 08/14/2025
+  ms.date: 12/29/2025
 
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