Update Directory.Build.props

Author: HaoK

Directory.Build.props

@@ -21,7 +21,7 @@
     <IsSampleProject Condition="$(RepoRelativeProjectDir.Contains('sample'))">true</IsSampleProject>
     <IsAnalyzersProject Condition="$(MSBuildProjectName.EndsWith('.Analyzers'))">true</IsAnalyzersProject>
     <IsShipping Condition="'$(IsSampleProject)' == 'true' or '$(IsTestAssetProject)' == 'true' or '$(IsBenchmarkProject)' == 'true' or '$(IsUnitTestProject)' == 'true'">false</IsShipping>
-    
+
     <!--
       Following logic mimics core-setup approach as well as
       https://github.com/dotnet/arcade/blob/694d59f090b743f894779d04a7ffe11cbaf352e7/src/Microsoft.DotNet.Arcade.Sdk/tools/Publish.proj#L30-L31