Bump Microsoft.NET.Test.Sdk from 17.11.1 to 17.12.0 in /src#611

dependabot[bot] merged 1 commit intomainVerifyTests/Verify.ImageSharp:mainfrom

dependabot/nuget/src/Microsoft.NET.Test.Sdk-17.12.0VerifyTests/Verify.ImageSharp:dependabot/nuget/src/Microsoft.NET.Test.Sdk-17.12.0Copy head branch name to clipboard