Bump SixLabors.ImageSharp from 3.1.7 to 3.1.8#125

stesee merged 1 commit intomainCodeuctivity/ImageSharp.Compare:mainfrom

dependabot/nuget/SixLabors.ImageSharp-3.1.8Codeuctivity/ImageSharp.Compare:dependabot/nuget/SixLabors.ImageSharp-3.1.8Copy head branch name to clipboard