updates dotnet foundation url

Author: mzorec

README.md

@@ -8,7 +8,7 @@
 [![Build Status](https://travis-ci.org/dotnetcore/FlubuCore.svg?branch=master)](https://travis-ci.org/dotnetcore/FlubuCore)
 [![NuGet Badge](https://buildstats.info/nuget/flubucore)](https://www.nuget.org/packages/FlubuCore/)
 [![Gitter](https://img.shields.io/gitter/room/FlubuCore/Lobby.svg)](https://gitter.im/FlubuCore/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![Member project of .NET Foundation](https://img.shields.io/badge/.NET-Foundation-68217a.svg)](https://dotnetfoundation.org/projects/flubucore)
+[![Member project of .NET Foundation](https://img.shields.io/badge/.NET-Foundation-68217a.svg)](https://github.com/dotnet-foundation/projects/issues/9)
 [![Member project of .NET Core Community](https://img.shields.io/badge/member%20project%20of-NCC-9e20c9.svg)](https://github.com/dotnetcore)
 [![License](https://img.shields.io/github/license/dotnetcore/FlubuCore.svg)](https://github.com/dotnetcore/FlubuCore/blob/master/LICENSE)