Update WPFDevelopers.Shared.projitems

Author: yanjinhuagood

src/WPFDevelopers.Shared/WPFDevelopers.Shared.projitems

@@ -11,6 +11,7 @@
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)Controls\ColorPicker\ColorPicker.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\ColorPicker\HSB.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Controls\ColorPicker\HSL.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Core\Assists\ThincknessAssert.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Badge\Badge.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\BreadCrumbBar\BreadCrumbBar.cs" />