Specifying custom tag names does not work

I am trying to use custom names for my properties however that attribute is not working. For reference my log generator is as follows:
```c#
[LoggerMessage(
EventId = 0,
Message = "Have recorded metric")]
public static partial void RecordMetric(
#pragma warning disable EXTEXP0003 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.
this ILogger logger, LogLevel logLevel, [LogProperties(SkipNullProperties = true)] [TagName("test")] MetricDef metric, [LogProperties(SkipNullProperties = true)] MetricDescriptorDef descriptor, [LogProperties(SkipNullProperties = true)] EventDef @event);
#pragma warning restore EXTEXP0003 // Type is for evaluation purposes only and is subject to change or removal in future updates. Suppress this diagnostic to proceed.

```

The code compiles but the property doesn't change name. to reflect.

Let me know if this needs to become a feature request.