Fix .NET Packages

[tinohager]

The package has been marked as obsolete, the owner has start a new project
https://github.com/ljchuello/Hetzner-Cloud-DotNet

[apricote]

Looking at the READMEs it seems like the new project supports less resources.

@ljchuello Do you want us to link to the new project instead?

[ljchuello]

Looking at the READMEs it seems like the new project supports less resources.

@ljchuello Do you want us to link to the new project instead?

Yes @apricote, link to the new project. Thank you.

[apricote]

I have updated the link + description in our CMS. The change will be visible in the next 15 minutes. Thanks for working on the ecosystem :)