Update Magick.NET package to use OpenMP-x64 version instead of ARM64

src/PicView.Core/PicView.Core.csproj

@@ -25,7 +25,7 @@
     <PlatformTarget>ARM64</PlatformTarget>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Magick.NET-Q8-arm64" Version="14.6.0" />
+    <PackageReference Include="Magick.NET-Q8-OpenMP-x64" Version="14.6.0" />
     <PackageReference Include="ReactiveUI" Version="20.3.1" />
     <PackageReference Include="SharpCompress" Version="0.40.0" />
     <PackageReference Include="ZString" Version="2.6.0" />