Merge pull request #46012 from omartin2010/patch-15

fixed typo

Author: ktoliver

articles/machine-learning/how-to-troubleshoot-deployment.md

@@ -346,7 +346,7 @@ Local web service deployments require a working Docker installation on your loca
 
 
     myenv = Environment.from_conda_specification(name="env", file_path="myenv.yml")
-    myenv.docker.base_image = NONE
+    myenv.docker.base_image = None
     myenv.docker.base_dockerfile = "FROM mcr.microsoft.com/azureml/base:intelmpi2018.3-ubuntu16.04\nRUN apt-get update && apt-get install vim -y"
     inference_config = InferenceConfig(entry_script="score.py", environment=myenv)
     package = Model.package(ws, [model], inference_config)