Update automated-backups-overview.md

Removed for Azure SQL Managed Instance that the Data redundancy type set on an instance creation cannot be changed.
The new feature allows now the data redundancy type for STR (short term retention) to be changed even after an instance is created.
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cc: @SudhirRaparla

Author: MilanMSFT

articles/azure-sql/database/automated-backups-overview.md

@@ -38,7 +38,7 @@ For SQL Database, the backup storage redundancy can be configured at the time of
 
 
 > [!IMPORTANT]
-> Backup storage redundancy for Hyperscale and SQL Managed Instance can only be set during database creation. This setting cannot be modified once the resource is provisioned. [Database copy](database-copy.md) process can be used to update the backup storage redundancy settings for an existing Hyperscale database. 
+> Backup storage redundancy for Hyperscale can only be set during database creation. This setting cannot be modified once the resource is provisioned. [Database copy](database-copy.md) process can be used to update the backup storage redundancy settings for an existing Hyperscale database. 
 
 > [!IMPORTANT]
 > Zone-redundant storage is currently only available in [certain regions](../../storage/common/storage-redundancy.md#zone-redundant-storage).