chore(deps): bump SixLabors.ImageSharp in /ConversionTool

Bumps [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) from 3.0.1 to 3.1.3.
- [Release notes](https://github.com/SixLabors/ImageSharp/releases)
- [Commits](SixLabors/ImageSharp@v3.0.1...v3.1.3)

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

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

ConversionTool/ConversionTool.csproj

@@ -16,7 +16,7 @@
     <PackageReference Include="Serilog.Sinks.Debug" Version="2.0.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="5.0.0" />
     <PackageReference Include="Serilog.Sinks.Loggly" Version="5.4.0" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.0.1" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.3" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
   </ItemGroup>