Bump Microsoft.NET.Test.Sdk from 16.8.0 to 16.11.0 in /src#259

dependabot[bot] wants to merge 1 commit intodevelopSeanFeldman/ServiceBus.AttachmentPlugin:developfrom

dependabot/nuget/src/develop/Microsoft.NET.Test.Sdk-16.11.0SeanFeldman/ServiceBus.AttachmentPlugin:dependabot/nuget/src/develop/Microsoft.NET.Test.Sdk-16.11.0Copy head branch name to clipboard