Fixes compile error when referenced as project

Author: azeno

src/ImmutableObjectGraph.Generation/ImmutableObjectGraph.Generation.csproj

@@ -66,7 +66,7 @@
     <ItemGroup>
       <TargetPathWithTargetPlatformMoniker Include="$(OutputPath)\ImmutableObjectGraph.dll" IncludeRuntimeDependency="false" />
       <TargetPathWithTargetPlatformMoniker Include="$(OutputPath)\ImmutableObjectGraph.Generation.Attributes.dll" IncludeRuntimeDependency="false" />
-      <TargetPathWithTargetPlatformMoniker Include="..\..\lib\netstandard1.0\CG.Pluralization.dll" IncludeRuntimeDependency="false" />
+      <TargetPathWithTargetPlatformMoniker Include="$(OutputPath)\CG.Pluralization.dll" IncludeRuntimeDependency="false" />
       <TargetPathWithTargetPlatformMoniker Include="$(PkgValidation)\lib\netstandard2.0\Validation.dll" IncludeRuntimeDependency="false" />
     </ItemGroup>
   </Target>