Update azure-pipelines.yml for Azure Pipelines

azure-pipelines.yml

@@ -49,5 +49,5 @@ steps:
 - powershell: |
     If ($env:BRANCH.StartsWith('refs/tags/')) { nuget push -ApiKey $env:APIKEY -Source https://api.nuget.org/v3/index.json $(Build.ArtifactStagingDirectory)/**/*.nupkg }
   env:
-    #APIKEY: $(nuget-apikey)
+    APIKEY: $(nuget-apikey)
     BRANCH: $(Build.SourceBranch)