Revert "Remove preview for government region."

Author: MikeRayMSFT

docs/sql-server/azure-arc/includes/azure-arc-data-regions.md

@@ -17,7 +17,7 @@ SQL Server enabled by Azure Arc is available in the following regions:
 - North Central US
 - South Central US
 - West Central US
-- US Government Virginia
+- US Government Virginia <sup>1</sup>
 - Canada Central
 - Canada East
 - UK South
@@ -37,6 +37,8 @@ SQL Server enabled by Azure Arc is available in the following regions:
 - Sweden Central
 - Norway East
 
+<sup>1</sup> The US Government Virginia region is currently in preview, and not all features are supported yet. For details, review [SQL Server enabled by Azure Arc in US Government Preview](../us-government-region.md).
+
 > [!IMPORTANT]
 >
 > - For successful onboarding and functioning, assign the same region to both Arc-enabled Server and Arc-enabled SQL Server.