Merge branch 'rocketgirl-Improve-docs' into 'main'

Expand documentation for terraform module publish readme

See merge request gitlab-com/gl-infra/common-ci-tasks!836

terraform-module-publish.md

 # [`terraform-module-publish`](./terraform-module-publish.yml)
-Publish a Terraform Module in the GitLab Terraform Module Registry
+The purpose of this project is to establish a standardized way to publish a
+Terraform Module to the GitLab Terraform Module Registry. Your first step is to
+add the following code block to your repository's CI task. In most cases this
+means adding the following project to the `include` section of the
+.gitlab-ci.yml file at the root of your repository.
 ```yaml
 include: