Update toc.yml

Author: jonburchel

articles/ai-studio/toc.yml

@@ -8,6 +8,7 @@ items:
     href: what-is-ai-studio.md
   - name: Azure AI Studio architecture
     href: concepts/architecture.md
+  - name: AI Studio or AML: Which should I choose?
   - name: Region support
     href: reference/region-support.md
   - name: Azure AI FAQ