[Synapse] Update artifact to 1.0.0-preview.21 (Azure#27208)

Author: kevinzz6

src/Synapse/Synapse/ChangeLog.md

@@ -19,6 +19,7 @@
 -->
 
 ## Upcoming Release
+* Updated Azure.Analytics.Synapse.Artifacts to 1.0.0-preview.21.
 
 ## Version 3.1.1
 * Removed "Microsoft.Azure.Management.Synapse" Version "2.6.0-preview" package reference 

src/Synapse/Synapse/Synapse.csproj

@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.Analytics.Synapse.AccessControl" Version="1.0.0-preview.5" />
-    <PackageReference Include="Azure.Analytics.Synapse.Artifacts" Version="1.0.0-preview.20" />
+    <PackageReference Include="Azure.Analytics.Synapse.Artifacts" Version="1.0.0-preview.21" />
     <PackageReference Include="Azure.Analytics.Synapse.ManagedPrivateEndpoints" Version="1.0.0-beta.5" />
     <PackageReference Include="Azure.Analytics.Synapse.Spark" Version="1.0.0-preview.7" />
     <PackageReference Include="Microsoft.DataTransfer.Gateway.Encryption" Version="5.29.8499.2" />