Actor response object deserialization with JSON serialization results in empty objects

When using actor proxies with JSON serialization, response objects of actor methods are not deserialized properly out-of-the-box.
I made a small [repro](https://github.com/ngruson/actor-serialization-issue).

A JSON returned by the Dapr runtime could look like this:
```json
{
"value":{
"retVal":{
"id": "166e0bbf-7084-476f-803b-c4e1418eef7e",
"name":"John Doe"}
}
}
```

with a response object defined like this:
```csharp
public record Person(Guid Id, string Name);
```

Since the object properties are lowercased in the JSON and System.Text.Json is case sensitive by default, the properties of the `Person` object below are not populated.

As a workaround, I could pass in `JsonSerializerOptions` when initializing the actor proxy, like so:
```csharp
ActorProxyOptions actorProxyOptions = new()
{
UseJsonSerialization = true,
JsonSerializerOptions = new JsonSerializerOptions
{
PropertyNameCaseInsensitive = true
}
};

IPersonActor actorProxy = actorProxyFactory.CreateActorProxy(actorId,
nameof(PersonActor), actorProxyOptions);

Person person = await actorProxy.ReturnPerson();
```

It was not immediately apparent to me that I had to set the `PropertyNameCaseInsensitive` property.

Question: should object properties be matched case-insensitively out-of-the-box when using the JSON serializer?
Please add your feedback in the comments.