Bump SixLabors.ImageSharp from 1.0.0-beta0006 to 2.1.8 in /src/NnCase.Evaluation#2

dependabot[bot] wants to merge 1 commit intofeatures/refactordotnetGame/nncase:features/refactorfrom

dependabot/nuget/src/NnCase.Evaluation/SixLabors.ImageSharp-2.1.8dotnetGame/nncase:dependabot/nuget/src/NnCase.Evaluation/SixLabors.ImageSharp-2.1.8Copy head branch name to clipboard