added back insights and analytics to toc (#15765)

* added back insights and analytics to toc

* fix slug

_data/toc.yaml

@@ -1528,6 +1528,8 @@ manuals:
     section:
       - path: /docker-hub/publish/
         title: Overview
+      - path: /docker-hub/publish/insights-analytics/
+        title: Insights & analytics
       - path: /docker-hub/publish/publisher-center-migration/
         title: Migrate content from the Publisher Center
   - path: /docker-hub/release-notes/