Update toc.yml

Author: ProfessorKendrick

articles/partner-solutions/lambda-test/toc.yml

@@ -2,6 +2,7 @@ items:
 - name: Azure Native LambdaTest - HyperExecute (preview) Documentation
   href: index.yml
 - name: Overview
+  expanded: true
   items:
   - name: What is Azure Native LambdaTest - HyperExecute (preview)?
     href: overview.md 
@@ -11,6 +12,7 @@ items:
   - name: Create a resource
     href: create.md
 - name: How to
+  expanded: true
   items:
   - name: Manage your resource
     href: manage.md