added to TOC

Author: diannegali

defender-xdr/TOC.yml

@@ -154,6 +154,8 @@
                    href: dlp-investigate-alerts-defender.md
                  - name: Investigate data loss prevention alerts with Microsoft Sentinel
                    href: dlp-investigate-alerts-sentinel.md
+                 - name: Investigate and respond to container threats
+                   href: investigate-respond-container-threats.md  
                  - name: Alerts
                    href: investigate-alerts.md
                  - name: Alert classification playbooks