docs/data/reusables/repositories/security-alerts-x-github-severity.md

Email notifications for {% ifversion fpt or ghes %}{% data variables.product.prodname_dependabot_alerts %}{% else %}security alerts{% endif %} that affect one or more repositories include the X-GitHub-Severity header field. You can use the value of the X-GitHub-Severity header field to filter email notifications for {% ifversion fpt or ghes %}{% data variables.product.prodname_dependabot_alerts %}{% else %}security alerts{% endif %}.