Add Endpoints to handbook sidebar (#17621)

* Add Endpoints to handbook sidebar under Marketing > Positioning and selling

Author: Lizzieepton

src/navs/index.js

@@ -1176,6 +1176,10 @@ export const handbookSidebar = [
                         name: 'Data pipelines',
                         url: '/handbook/marketing/positioning/data-pipelines',
                     },
+                    {
+                        name: 'Endpoints',
+                        url: '/handbook/marketing/positioning/endpoints',
+                    },
                     {
                         name: 'LLM analytics',
                         url: '/handbook/marketing/positioning/llm-analytics',