toc and index updates for new section

Author: James-Green-Microsoft

articles/private-5g-core/index.yml

@@ -68,6 +68,8 @@ landingContent:
             url: create-a-site.md
           - text: Create a site - ARM template
             url: create-site-arm-template.md
+          - text: Create additional Packet Core instances for a site - Azure portal
+            url: create-additional-packet-core.md
           - text: Modify a service plan
             url: modify-service-plan.md
           - text: Delete a site

articles/private-5g-core/toc.yml

@@ -85,7 +85,9 @@ items:
     - name: Create a site - Azure portal
       href: create-a-site.md
     - name: Create a site - ARM template
-      href: create-site-arm-template.md
+      href: create-site-arm-template.md    
+    - name: Create additional Packet Core instances for a site - Azure portal
+      href: create-additional-packet-core.md
     - name: Modify a service plan
       href: modify-service-plan.md
     - name: Delete a site