Update toc.yml

Author: surbhijain16

articles/cloud-services-extended-support/toc.yml

@@ -55,7 +55,7 @@
       href: schema-cscfg-role.md
     - name: NetworkConfiguration schema
       href: schema-cscfg-networkconfiguration.md
-- name: How To
+- name: Migration
   items:
   - name: Migrate to Azure Cloud Services (extended support)
     items:
@@ -71,6 +71,10 @@
       href: post-migration-changes.md
     - name: Common errors and known issues
       href: in-place-migration-common-errors.md
+  - name: Feature Analysis CSES vs VMSS
+    href: feature-support-cses-vmss.md
+- name: How To
+  items:
   - name: Apply extensions
     items:
     - name: Apply Remote Desktop extension