docs: added overview hook (#662)

Author: Khuzaima05

README.md

@@ -49,6 +49,7 @@ For more information about the default configuration, see [Default Secure Landin
 - [VSI on VPC landing zone - QuickStart variation](https://cloud.ibm.com/docs/secure-infrastructure-vpc?topic=secure-infrastructure-vpc-vsi-ra-qs)
 - [Red Hat OpenShift Container Platform on VPC landing zone](https://cloud.ibm.com/docs/secure-infrastructure-vpc?topic=secure-infrastructure-vpc-ocp-ra)
 
+## terraform-ibm-landing-zone
 
 Complete the following steps before you deploy the Secure Landing Zone module.
 ### Set up an IBM Cloud Account