Create VA section in TOC and add overview

Author: bmansheim

articles/defender-for-cloud/TOC.yml

@@ -366,22 +366,24 @@
       - name: Get started
         displayName: database
         href: defender-for-sql-introduction.md
-      - name: Enable vulnerability assessment
-        href: sql-azure-vulnerability-assessment-enable.md
-      - name: Manage vulnerability assessments
-        href: sql-azure-vulnerability-assessment-manage.md
-      - name: Find and remediate vulnerabilities
-        href: sql-azure-vulnerability-assessment-find.md
-      - name: Investigate threats
-        href: /azure/azure-sql/database/threat-detection-overview?toc=/azure/defender-for-cloud/toc.json
-      - name: Review sensitive data
-        href: sql-information-protection-policy.md
-      - name: Vulnerability Assessment rules
-        href: sql-azure-vulnerability-assessment-rules.md
-      - name: Vulnerability Assessment rules changelog
-        href: sql-azure-vulnerability-assessment-rules-changelog.md
-      - name: Store vulnerability scans in storage
-        href: /azure/azure-sql/database/sql-database-vulnerability-assessment-storage?toc=/azure/defender-for-cloud/toc.json
+      - name: Defender for Azure SQL Databases
+        items:
+        - name: Overview
+          href: sql-azure-vulnerability-assessment-overview.md
+        - name: Enable vulnerability assessment
+          href: sql-azure-vulnerability-assessment-enable.md
+        - name: Manage vulnerability assessments
+          href: sql-azure-vulnerability-assessment-manage.md
+        - name: Find and remediate vulnerabilities
+          href: sql-azure-vulnerability-assessment-find.md
+        - name: Investigate threats
+          href: /azure/azure-sql/database/threat-detection-overview?toc=/azure/defender-for-cloud/toc.json
+        - name: Vulnerability assessment rules
+          href: sql-azure-vulnerability-assessment-rules.md
+        - name: Vulnerability assessment rules changelog
+          href: sql-azure-vulnerability-assessment-rules-changelog.md
+        - name: Store vulnerability scans in storage
+          href: /azure/azure-sql/database/sql-database-vulnerability-assessment-storage?toc=/azure/defender-for-cloud/toc.json
     - name: Defender for SQL servers on machines
       items:
       - name: Enable Defender for SQL servers on machines