Bump SixLabors.ImageSharp from 2.1.7 to 2.1.8 in /samples/Samples.Upload (#1128)

Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

samples/Samples.Upload/Samples.Upload.csproj

@@ -8,7 +8,7 @@
  </PropertyGroup>
 
  <ItemGroup>
- <PackageReference Include="SixLabors.ImageSharp" Version="2.1.7" />
+ <PackageReference Include="SixLabors.ImageSharp" Version="2.1.8" />
  </ItemGroup>
 
  <ItemGroup>