fixed PR validation error

Author: bandersmsft

articles/cost-management-billing/cost-management-billing-overview.md

@@ -1,5 +1,5 @@
 ---
-title: Overview of Cost Management + Billing
+title: Overview of Azure Cost Management + Billing
 description: You use Cost Management + Billing features to conduct billing administrative tasks and manage billing access to costs. You also use the features to monitor and control Azure spending and to optimize Azure resource use.
 keywords:
 author: bandersmsft

articles/cost-management-billing/reservations/view-purchase-refunds.md

@@ -5,7 +5,7 @@ author: yashesvi
 ms.service: cost-management-billing
 ms.subservice: reservations
 ms.topic: how-to
-ms.date: 10/074/2021
+ms.date: 10/07/2021
 ms.author: banders
 ---