Clarifying Namespace in Terraform Module Registry

doc/user/packages/terraform_module_registry/index.md

@@ -93,7 +93,7 @@ credentials "gitlab.com" {
 
 Where `gitlab.com` can be replaced with the hostname of your self-managed GitLab instance.
 
-You can then reference your Terraform Module from a downstream Terraform project:
+You can then refer to your Terraform Module from a downstream Terraform project:
 
 ```plaintext
 module "<module>" {
@@ -101,6 +101,8 @@ module "<module>" {
 }
 ```
 
+Where `<namespace>` is the [namespace](../../../user/group/index.md#namespaces) of the Terraform module registry.
+
 ## Publish a Terraform module by using CI/CD
 
 To work with Terraform modules in [GitLab CI/CD](../../../ci/index.md), you can use