Bump Microsoft.NET.Test.Sdk from 17.6.0 to 18.4.0#6

dependabot[bot] wants to merge 1 commit intomainCleverCodeCravers/Timeout:mainfrom

dependabot/nuget/Source/timeout/timeout.Domain.Tests/Microsoft.NET.Test.Sdk-18.4.0CleverCodeCravers/Timeout:dependabot/nuget/Source/timeout/timeout.Domain.Tests/Microsoft.NET.Test.Sdk-18.4.0Copy head branch name to clipboard