Generated JSON example is wrong for additional properties when KebabCaseNamingStrategy was configured

[gileli121]

Hello, if you configure the service to use KebabCaseNamingStrategy like this:

	public void ConfigureServices(IServiceCollection services)
	{
		services.AddMvc(options =>
			{
				options.UseGeneralRoutePrefix(RoutePrefix);
				options.Filters.Add(typeof(UnhandledExceptionFilter));
				options.EnableEndpointRouting = false;
			})
			.AddNewtonsoftJson(options =>
			{
				options.SerializerSettings.Converters.Add(new StringEnumConverter());
				options.SerializerSettings.DateTimeZoneHandling = DateTimeZoneHandling.Utc;
				options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
				options.SerializerSettings.ContractResolver = new DefaultContractResolver
				{
					NamingStrategy = new KebabCaseNamingStrategy
					{
						ProcessDictionaryKeys = true,
						OverrideSpecifiedNames = true
					}
				};
				options.SerializerSettings.Formatting = Formatting.Indented;
			});


		services.AddSwaggerGen(c =>
		{
			c.SwaggerDoc(ServiceName, new OpenApiInfo { Title = ServiceTitle, Version = "v1" });
			c.AddAuthorizeButton();
		});
		services.AddSwaggerGenNewtonsoftSupport();

		...
	}

And have this DTO:

    public class DTOTest
    {
        [JsonExtensionData] public IDictionary<string, JToken> ExtraStuff { get; set; }
        public string DtoField { get; set; }
    }

Abd has this controller:

[Route("/test")]
[ApiController]
public class TestController : ContextController
{
	[HttpPost]
	[Route("test")]
	public async Task<IActionResult> CreateTestsAsync([FromBody] DTOTest myDto)
	{
		return Ok();
	}
}

Then the swagger generates this example payload:

This seems wrong to me because the example fields for ExtraStuff property should be written also in the Kebab-case naming style.
So, I would expect to see here this example payload:

{
  "dto-field": "string",
  "additional-prop1": "string",
  "additional-prop2": "string",
  "additional-prop3": "string"
}

Is there any way to fix this issue?
If not, removing the "additionalProp1", "additionalProp2", and "additionalProp3" is also an option.

Thank you.