Restructure Solutions node for TOC

Moving/indenting these two entries under a new subnode "Specific solutions"

    - name: Benefits of using Azure NetApp Files with Oracle Database
      href: solutions-benefits-azure-netapp-files-oracle-database.md
    - name: Benefits of using Azure NetApp Files for electronic design automation
      href: solutions-benefits-azure-netapp-files-electronic-design-automation.md

Author: Julie Chen

articles/azure-netapp-files/TOC.yml

@@ -39,10 +39,12 @@
     items:
     - name: Solution architectures using Azure NetApp Files
       href: azure-netapp-files-solution-architectures.md
-    - name: Benefits of using Azure NetApp Files with Oracle Database
-      href: solutions-benefits-azure-netapp-files-oracle-database.md
-    - name: Benefits of using Azure NetApp Files for electronic design automation
-      href: solutions-benefits-azure-netapp-files-electronic-design-automation.md
+    - name: Specific solutions
+      items:
+      - name: Benefits of using Azure NetApp Files with Oracle Database
+        href: solutions-benefits-azure-netapp-files-oracle-database.md
+      - name: Benefits of using Azure NetApp Files for electronic design automation
+        href: solutions-benefits-azure-netapp-files-electronic-design-automation.md
   - name: FAQs about Azure NetApp Files
     href: azure-netapp-files-faqs.md
 - name: How-to guides