updated syntax.

Author: AbdullahBell

articles/private-link/toc.yml

@@ -31,7 +31,7 @@
       href: create-private-endpoint-template.md
     - name: Create a private endpoint - Terraform
       href: create-private-endpoint-terraform.md
-  - name: Create a private Link service
+  - name: Create a Private Link service
     items:
     - name: Create a Private Link service - Azure portal
       href: create-private-link-service-portal.md