Renamed toc title

Author: dannyevers

articles/marketplace/TOC.yml

@@ -229,7 +229,7 @@
         href: azure-vm-faq.yml
       - name: VM certification troubleshooting
         href: azure-vm-certification-faq.yml
-    - name: Update core sizes
+    - name: Update pricing
       href: azure-vm-plan-manage.md
   - name: Consulting services offer
     items: