Update supported-configurations.md

Added clarity relating to only 64-bit support (IcM 614403597).

Author: PhilB-MSFT

docs/sql-server/azure-arc/includes/supported-configurations.md

@@ -11,6 +11,9 @@ ms.topic: include
 
 [!INCLUDE [sssql11-md](../../../includes/sssql11-md.md)] and later versions.
 
+> [!NOTE]
+> Only 64-bit SQL Server versions are supported.
+ 
 ### Operating systems
 
 - Windows 10 and 11