Bump SixLabors.ImageSharp in the nuget group across 1 directory

Bumps the nuget group with 1 update in the / directory: [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp).


Updates `SixLabors.ImageSharp` from 3.1.5 to 3.1.7
- [Release notes](https://github.com/SixLabors/ImageSharp/releases)
- [Commits](https://github.com/SixLabors/ImageSharp/compare/v3.1.5...v3.1.7)

---
updated-dependencies:
- dependency-name: SixLabors.ImageSharp
  dependency-type: direct:production
  dependency-group: nuget
...

Signed-off-by: dependabot[bot] <support@github.com>

SkinsApi.csproj

@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="AspNetCoreRateLimit" Version="5.0.0" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.19.6" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.5" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.7" />
     <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="2.1.4" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
     <PackageReference Include="System.Drawing.Common" Version="8.0.7" />