add to toc

Author: TomArcherMsft

articles/virtual-network/ip-services/toc.yml

@@ -13,6 +13,8 @@ items:
     href: create-public-ip-powershell.md
   - name: Create public IP address - Azure CLI
     href: create-public-ip-cli.md
+  - name: Create public IP address - Terraform
+    href: create-public-ip-terraform.md
   - name: Create public IP address - ARM template
     href: create-public-ip-template.md
   - name: Create public IP prefix - Portal