Update TOC.yml

Author: v-smandalika

defender-endpoint/TOC.yml

@@ -10,6 +10,8 @@
       href: zero-trust-with-microsoft-defender-endpoint.md
     - name: Trial user guide - Microsoft Defender for Endpoint
       href: defender-endpoint-trial-user-guide.md
+    - name: Pilot and deploy Microsoft Defender for Endpoint
+      href: pilot-deploy-defender-endpoint.md
     - name: Minimum requirements
       href: minimum-requirements.md
     - name: Supported Microsoft Defender for Endpoint capabilities by platform