Update toc.yml

Author: Juliako

articles/azure-video-indexer/toc.yml

@@ -76,6 +76,8 @@
     items:
     - name: Audio Effects Detection
       href: /legal/azure-video-indexer/audio-effects-detection-transparency-note?context=/azure/azure-video-indexer/context/context
+    - name: Face Detection
+      href: /legal/azure-video-indexer/face-detection-transparency-note?context=/azure/azure-video-indexer/context/context
 - name: How to guides
   items:
   - name: Connect an existing account to ARM (Preview)