Add Minimal API's ProducesResponseTypeAttribute now supporting Description correctly to the next preview release notes

[sander1095]

Hi!

I contributed a new Description property to ASP.NET Core's ProducesResponseType in an earlier preview release of .NET 10.

This had some issues in a Minimal API environment (dotnet/aspnetcore#60518), and was (correctly) marked as "not supported" for Minimal API's.

I've managed to hunt this issue down and created a PR (dotnet/aspnetcore#62695). While this still needs a review from the ASP.NET Core team, I think it's good to mention that this issue has been fixed in the Preview release notes that the PR will be a part of.

I've already created an issue and PR to update the overall "What's new in ASP.NET Core 10" document, but I would suggest adding this to the release notes of a new preview, too. This way, people that read the Preview documents chronologically will know in what preview this issue was fixed.

[sander1095]

Not relevant for this repo, closing