Adds AI Studio vs AML comparison article to TOC

Author: jonburchel

articles/machine-learning/toc.yml

@@ -5,6 +5,8 @@
     - name: What is Azure Machine Learning?
       displayName: AML, services, overview, introduction
       href: overview-what-is-azure-machine-learning.md
+    - name: "AI Studio or AML: Which should I choose?"
+      href: /ai/ai-studio-experiences-overview?context=/azure/machine-learning/context/ml-context  
     - name: Azure Machine Learning CLI and Python SDK
       href: concept-v2.md
     # v1