Enable WriteCore feature for datamigration (Azure#46140)

Author: melina5656

sdk/datamigration/Azure.ResourceManager.DataMigration/CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Features Added
 
 - Enable the new model serialization by using the System.ClientModel, refer this [document](https://aka.ms/azsdk/net/mrw) for more details.
+- Exposed `JsonModelWriteCore` for model serialization procedure.
 
 ### Breaking Changes
 

sdk/datamigration/Azure.ResourceManager.DataMigration/api/Azure.ResourceManager.DataMigration.netstandard2.0.cs

@@ -2,5 +2,5 @@
   "AssetsRepo": "Azure/azure-sdk-assets",
   "AssetsRepoPrefixPath": "net",
   "TagPrefix": "net/datamigration/Azure.ResourceManager.DataMigration",
-  "Tag": "net/datamigration/Azure.ResourceManager.DataMigration_1ee5dd2e9c"
+  "Tag": "net/datamigration/Azure.ResourceManager.DataMigration_b2c6384230"
 }