Update comment in BaseObjectStorageHelper from comment in #3702

Author: michael-hawker

Microsoft.Toolkit.Uwp/Helpers/ObjectStorage/BaseObjectStorageHelper.cs

@@ -22,7 +22,7 @@ public abstract class BaseObjectStorageHelper : IObjectStorageHelper
         /// Initializes a new instance of the <see cref="BaseObjectStorageHelper"/> class,
         /// which can read and write data using the provided <see cref="IObjectSerializer"/>;
         /// In 6.1 and older the default Serializer was based on Newtonsoft.Json.
-        /// To implement a <see cref="IObjectSerializer"/> based on Newtonsoft.Json or System.Text.Json see https://aka.ms/wct/storagehelper-migration
+        /// To implement an <see cref="IObjectSerializer"/> based on System.Text.Json, Newtonsoft.Json, or DataContractJsonSerializer see https://aka.ms/wct/storagehelper-migration
         /// </summary>
         /// <param name="objectSerializer">The serializer to use.</param>
         public BaseObjectStorageHelper(IObjectSerializer objectSerializer)