Update azure-pipelines.yml for Azure Pipelines

Author: yangpanMS

.pipelines/azure-pipelines.yml

@@ -86,6 +86,9 @@ steps:
     MaxConcurrency: '50'
     MaxRetryAttempts: '5'
 
+- task: NuGetAuthenticate@1
+  displayName: 'Authenticate with NuGet feed'
+
 - script: dotnet nuget push $(Build.SourcesDirectory)\out\packages\*.nupkg --api-key VSTS --timeout 1200 --source https://msazure.pkgs.visualstudio.com/_packaging/CRC-VC/nuget/v3/index.json --skip-duplicate
   displayName: 'Publish NuGet to ADO Artifact Packages as temporary workaround to ADO lagging behind in package availability'