docs: Add Terraform Registry badge to README (#956)

* chore: run pre-commit hooks

* docs: Add Terraform Registry badge to README

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Co-authored-by: raagamounica <mounica.tellabati@ibm.com>
Co-authored-by: Conall Ó Cofaigh <ocofaigh@ie.ibm.com>

Author: 3 people

README.md

@@ -6,6 +6,7 @@
 [![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
 [![pre-commit](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white)](https://github.com/pre-commit/pre-commit)
 [![Catalog release](https://img.shields.io/badge/release-IBM%20Cloud%20Catalog-3662FF?logo=ibm)](https://cloud.ibm.com/catalog/modules/terraform-ibm-base-ocp-vpc-8531b562-91d5-4974-a195-5dff72ef2a5d-global)
+[![Terraform Registry](https://img.shields.io/badge/terraform-registry-623CE4?logo=terraform)](https://registry.terraform.io/modules/terraform-ibm-modules/base-ocp-vpc/ibm/latest)
 
 Use this module to provision an [IBM Cloud Red Hat OpenShift cluster](https://cloud.ibm.com/docs/openshift?topic=openshift-getting-started) on VPC Gen2. The module either creates the required Cloud Object Storage instance or uses an existing instance. The module also supports optionally passing a key management configuration for secret encryption and boot volume encryption.