Bump SixLabors.ImageSharp in /samples/Samples.Upload

Bumps [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) from 2.1.9 to 2.1.10.
- [Release notes](https://github.com/SixLabors/ImageSharp/releases)
- [Commits](SixLabors/ImageSharp@v2.1.9...v2.1.10)

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

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samples/Samples.Upload/Samples.Upload.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SixLabors.ImageSharp" Version="2.1.9" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="2.1.10" />
   </ItemGroup>
 
   <ItemGroup>