Merge pull request #2086 from PiranhaCMS/dependabot/nuget/core/Piranha.ImageSharp/SixLabors.ImageSharp-2.1.9

Bump SixLabors.ImageSharp from 2.1.8 to 2.1.9 in /core/Piranha.ImageSharp

Author: tidyui

core/Piranha.ImageSharp/Piranha.ImageSharp.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SixLabors.ImageSharp" Version="2.1.8" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="2.1.9" />
     <ProjectReference Include="..\Piranha\Piranha.csproj" />
   </ItemGroup>