Update readme.md
Update readme.md

AzureADSamples/WebApp-GroupClaims-DotNet,AzureADSamples/WebApp-GroupClaims-DotNet,Azure-Samples/active-directory-dotnet-webapp-groupclaims,Azure-Samples/active-directory-dotnet-webapp-groupclaims,Azure-Samples/active-directory-dotnet-webapp-groupclaims,AzureADSamples/WebApp-GroupClaims-DotNet