You can use Review Replied Workflow to send reviewers a notification email after their review has been replied by admin.
Setting up Workflow
Select Workflow Playbook
Go to workflow playbooks page and select Review Replied playbook.
- Select Email (Step 2) and add new email with using template "Review Replied" email template.
Click Submit to create workflow. That's it, setting up Review Replied Workflow is easy when you are creating from playbook.