Update sources.mdx

Add link and reference to generic hostname feature

website/docs/language/modules/sources.mdx

@@ -134,6 +134,8 @@ Enterprise instance, its private registry hostname is the same as the host
 where you'd access the web UI and the host you'd use when configuring
 the [Terraform Cloud CLI integration](/terraform/cli/cloud).
 
+Both Terraform Cloud and self-hosted Terraform Enterprise support a [generic hostname](/terraform/cloud-docs/registry/using#generic-hostname-terraform-cloud-and-terraform-enterprise) `localterraform.com`.
+
 Registry modules support versioning. You can provide a specific version as shown
 in the above examples, or use flexible
 [version constraints](/terraform/language/modules/syntax#version).