update the toc structure

Author: DeCohen

CloudAppSecurityDocs/toc.yml

@@ -315,6 +315,8 @@ items:
     - name: Governing connected apps
       href: governance-actions.md
       displayName: governance actions
+  - name: Integrate with SIEM and API solutions
+    items:
     - name: Manage events with SIEM solutions
       items:
       - name: Integrate with Microsoft Sentinel