Restore toc entries under alerting.md (parent file not yet in main)

Author: nastasha-solomon

explore-analyze/toc.yml

@@ -380,6 +380,13 @@ toc:
           - file: report-and-share/reporting-troubleshooting-pdf.md
   - file: alerting.md
     children:
+      - file: alerting/kibana-alerting-experimental/workflows-alerting.md
+      - file: alerting/kibana-alerting-experimental/notifications.md
+        children:
+          - file: alerting/kibana-alerting-experimental/notifications/create-configure-action-policy.md
+          - file: alerting/kibana-alerting-experimental/notifications/action-policy-reference.md
+          - file: alerting/kibana-alerting-experimental/notifications/manage-action-policies.md
+          - file: alerting/kibana-alerting-experimental/notifications/notification-gating.md
       - file: alerting/alerts.md
         children:
           - file: alerting/alerts/alerting-getting-started.md