Provide updated JsonPatch sample for new hosting model

Show example with new hosting model for
https://docs.microsoft.com/en-us/aspnet/core/web-api/jsonpatch?view=aspnetcore-6.0#json-patch-addnewtonsoftjson-and-systemtextjson

The current implementation results in warning

Warning ASP0000 Calling 'BuildServiceProvider' from application code results in an additional copy of singleton services being created. Consider alternatives such as dependency injecting services as parameters to 'Configure'.

This is relevant to code

```
static NewtonsoftJsonPatchInputFormatter GetJsonPatchInputFormatter()
{
var builder = new ServiceCollection()
.AddLogging()
.AddMvc()
.AddNewtonsoftJson()
.Services.BuildServiceProvider();

return builder
.GetRequiredService>()
.Value
.InputFormatters
.OfType()
.First();
}
```

---
#### Document Details

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* ID: 20acee3e-8b6e-b3fb-8271-661e1a287bdd
* Version Independent ID: 20acee3e-8b6e-b3fb-8271-661e1a287bdd
* Content: [Code samples migrated from ASP.NET Core 5.0 to 6.0](https://docs.microsoft.com/en-us/aspnet/core/migration/50-to-60-samples?view=aspnetcore-5.0)
* Content Source: [aspnetcore/migration/50-to-60-samples.md](https://github.com/dotnet/AspNetCore.Docs/blob/main/aspnetcore/migration/50-to-60-samples.md)
* Product: **aspnet-core**
* Technology: **aspnetcore-migration**
* GitHub Login: @Rick-Anderson
* Microsoft Alias: **riande**