Fix the folder to pick NuGet package to publish from (#40)

Author: adityapatwardhan

tools/releaseBuild/yaml/publish.yml

@@ -35,6 +35,6 @@ stages:
             displayName: 'NuGet push'
             inputs:
               command: push
-              packagesToPush: '$(Build.ReleaseDirectory)/Microsoft.PowerShell.Native.*.nupkg'
+              packagesToPush: '$(Build.ArtifactStagingDirectory)/Microsoft.PowerShell.Native.*.nupkg'
               nuGetFeedType: external
               publishFeedCredentials: ${{ parameters.feedCredential }}