Update concepts-backup.md

Author: v-ccolin

articles/mariadb/concepts-backup.md

@@ -53,8 +53,8 @@ The backup retention period governs how far back in time a point-in-time restore
 - Servers with up to 4-TB storage will retain up to 2 full database backups, all the differential backups, and transaction log backups performed since the earliest full database backup.
 -	Servers with up to 16-TB storage will retain the full database snapshot, all the differential snapshots and transaction log backups in last 8 days.
 
-#### Long term retention of backups
-Long term retention of backups beyond 35 days is currently not natively supported by the service yet. You have a option to use mysqldump to take backups and store them for long term retention. Our support team has blogged a [step by step article](https://techcommunity.microsoft.com/t5/azure-database-for-mysql/automate-backups-of-your-azure-database-for-mysql-server-to/ba-p/1791157) to share how you can achieve it. 
+#### Long-term retention of backups
+Long-term retention of backups beyond 35 days is currently not natively supported by the service yet. You have a option to use mysqldump to take backups and store them for long-term retention. Our support team has blogged a [step by step article](https://techcommunity.microsoft.com/t5/azure-database-for-mysql/automate-backups-of-your-azure-database-for-mysql-server-to/ba-p/1791157) to share how you can achieve it. 
 
 ### Backup redundancy options