Update test.mdx - Test private modules in the HCP Terraform private registry/ Enable testing - doc improvment (#1197)

Updated the module test/ enable testing doc

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[Jira ticket](https://hashicorp.atlassian.net/browse/IPL-8749)

Author: maddiegzibm

content/terraform-docs-common/docs/cloud-docs/registry/test.mdx

@@ -11,13 +11,13 @@ You can configure HCP Terraform to automatically run tests for modules in your p
 
 If your module uses the [branch-based publishing workflow](/terraform/cloud-docs/registry/publish-modules#branch-based-publishing) and its source code includes [tests](/terraform/language/v1.6.x/tests), you can enable testing at any time.
 
-To enable testing when you publish your module:
+To enable testing when publishing a new module:
 - Choose the **Branch** module publishing type
 - Assign a branch and a module version
 - Under testing, click the **Enable testing for module** checkbox
 - Click **Publish module**
 
-To enable testing after you publishing your branch-based module:
+To enable testing for an existing module:
 - Navigate to the module overview screen
 - Click **Configure Tests** to open the **Tests Settings** screen
 - Click **Enable testing for module**