wiring up toc, adding basic examples

Author: Larry Franks

articles/machine-learning/service/reference-azure-machine-learning-cli.md

@@ -193,7 +193,7 @@ The following commands demonstrate how to create, register, and list Azure Machi
 
     For more information, see [az ml environment download](https://docs.microsoft.com/cli/azure/ext/azure-cli-ml/ml/environment?view=azure-cli-latest#ext-azure-cli-ml-az-ml-environment-download).
 
-## Machine learning pipelines
+## ML pipeline management
 
 The following commands demonstrate how to work with machine learning pipelines:
 

articles/machine-learning/service/toc.yml

@@ -281,9 +281,8 @@
   - name: Machine Learning CLI
     displayName: extension, command line, command-line, az, ci/cd, automate, automated
     href: reference-azure-machine-learning-cli.md
-    items:
-      - name: Machine learning pipeline YAML reference
-        href: reference-pipeline-yaml.md
+  - name: Machine learning pipeline YAML reference
+    href: reference-pipeline-yaml.md
   - name: Visual interface modules
     displayName: module, reference, algorithm, studio
     items: