Add back arm64

Author: nums11

Samples/WinMLSamplesGallery/WinMLSamplesGallery (Package)/WinMLSamplesGallery (Package).wapproj

@@ -47,7 +47,7 @@
     <PackageCertificateThumbprint>57F96FCC00B6C183E454195CB67BE5961D5BCEBB</PackageCertificateThumbprint>
     <AppxPackageSigningTimestampDigestAlgorithm>SHA256</AppxPackageSigningTimestampDigestAlgorithm>
     <GenerateTestArtifacts>True</GenerateTestArtifacts>
-    <AppxBundlePlatforms>x86|x64</AppxBundlePlatforms>
+    <AppxBundlePlatforms>x86|x64|arm64</AppxBundlePlatforms>
     <HoursBetweenUpdateChecks>0</HoursBetweenUpdateChecks>
   </PropertyGroup>
   <PropertyGroup>