Bump SixLabors.ImageSharp from 3.1.0 to 3.1.1

Bumps [SixLabors.ImageSharp](https://github.com/SixLabors/ImageSharp) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/SixLabors/ImageSharp/releases)
- [Commits](SixLabors/ImageSharp@v3.1.0...v3.1.1)

---
updated-dependencies:
- dependency-name: SixLabors.ImageSharp
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

BadMedicine.Dicom/BadMedicine.Dicom.csproj

@@ -45,7 +45,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.0" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="3.1.1" />
     <PackageReference Include="SixLabors.ImageSharp.Drawing" Version="2.1.0" />
   </ItemGroup>