Update exchange-and-refund-azure-reservations.md

Author: pri-mittal

articles/cost-management-billing/reservations/exchange-and-refund-azure-reservations.md

@@ -126,7 +126,7 @@ The original invoice is canceled, and a new invoice is created. The money is ref
 
 Azure has the following policies for cancellations, exchanges, and refunds.
 
-## How is refund calculated
+**How is refund calculated**
 
 When a reservation is exchanged or canceled, the refund is calculated based on the number of remaining days in the reservation period. The calculation is done in UTC and uses a consistent formula to ensure fairness and transparency. Taking an example, if you bought an reservation on July 10, 2024, and exchanged it on July 9, 2025, only 1 day remains in the reservation. You’ll receive a small refund for that single day.