Fixed terminology per acrolinx scorecard

Author: v-shils

articles/machine-learning/index.yml

@@ -1,11 +1,11 @@
 ### YamlMime:Landing
 
 title: Azure Machine Learning documentation
-summary: Learn how to train, deploy, and manage machine learning models, automl experiments, and pipelines at scale with Azure Machine Learning. Tutorials, code examples, API references, and more show you how. 
+summary: Learn how to train, deploy, and manage machine learning models, AutoML experiments, and pipelines at scale with Azure Machine Learning. Tutorials, code examples, API references, and more show you how. 
 
 metadata:
   title: Azure Machine Learning documentation
-  description: Learn how to train, deploy, and manage machine learning models, automl experiments, and pipelines at scale with Azure Machine Learning. Tutorials, code examples, API references, and more show you how. 
+  description: Learn how to train, deploy, and manage machine learning models, AutoML experiments, and pipelines at scale with Azure Machine Learning. Tutorials, code examples, API references, and more show you how. 
 
   services: machine-learning
   ms.service: machine-learning