Bump the core group with 1 update

Bumps SixLabors.ImageSharp from 2.1.11 to 2.1.12

---
updated-dependencies:
- dependency-name: SixLabors.ImageSharp
  dependency-version: 2.1.12
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: core
...

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

Author: dependabot[bot]

src/PuzzleSolver/PuzzleSolver.csproj

@@ -6,7 +6,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="SixLabors.ImageSharp" Version="2.1.11" />
+		<PackageReference Include="SixLabors.ImageSharp" Version="2.1.12" />
 	</ItemGroup>
 
 </Project>