Add JsonElementConverter from MetadataServices

Author: strobelt

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/JsonSerializerOptions.Converters.cs

@@ -111,7 +111,7 @@ private static Dictionary<Type, JsonConverter> GetDefaultSimpleConverters()
             Add(JsonMetadataServices.Int16Converter);
             Add(JsonMetadataServices.Int32Converter);
             Add(JsonMetadataServices.Int64Converter);
-            Add(new JsonElementConverter());
+            Add(JsonMetadataServices.JsonElementConverter);
             Add(JsonMetadataServices.DocumentConverter);
             Add(JsonMetadataServices.ObjectConverter);
             Add(JsonMetadataServices.SByteConverter);