updated TOC

Author: diannegali

defender-xdr/TOC.yml

@@ -444,6 +444,8 @@
                 href: copilot-in-defender-file-analysis.md
               - name: Generate device summaries
                 href: copilot-in-defender-device-summary.md
+              - name: Summarize identities
+                href: security-copilot-defender-identity-summary.md                
               - name: Use guided responses
                 href: security-copilot-m365d-guided-response.md
               - name: Generate KQL queries