Github release for 9.9.1

[verdie-g]

Could you do a Github release for 9.9.1 🙏

We are using MEAI features as soon as they are released but we missed the 9.9.1 because there was no Github release. Additionally, even with the manual changelog, it is hard to know which commits are included in that release.

[KalleOlaviNiemitalo]

https://nuget.info/packages/Microsoft.Extensions.AI/9.9.1 "metadata source" may show the commit ID if you use a web browser with WebAssembly support. Or download the nupkg and unzip it.

[verdie-g]

That points to 54f611c which doesn't to be in the main branch :/

[verdie-g]

I can grab the parent though.