Bump SixLabors.ImageSharp from 1.0.0-beta0007 to 2.1.8 in /23-LoadTexture#6

dependabot[bot] wants to merge 1 commit intomasterJorgemagic/CSharpDirectXRaytracing:masterfrom

dependabot/nuget/23-LoadTexture/SixLabors.ImageSharp-2.1.8Jorgemagic/CSharpDirectXRaytracing:dependabot/nuget/23-LoadTexture/SixLabors.ImageSharp-2.1.8Copy head branch name to clipboard