Minor style compliance updates

Author: MikeRayMSFT

docs/sql-server/azure-arc/support-for-fci.md

@@ -48,7 +48,7 @@ The portal displays the databases on the SQL Server instance.
 
 - All the Windows and SQL Server instances that are part of the failover clustering should be in same resource group.
 - Always On availability groups on a failover cluster instance aren't supported for Azure Arc-enabled SQL Server at this time.
-- Currently, Best practices assessment is not supported with Always On failover cluster instance.
+- Currently, best practices assessment is not supported with Always On failover cluster instance.
 - Automated backups and point-in-time restore is not supported for failover cluster instances at this time.
 
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