docs: added segment guide (#12616)

* docs: added segment guide

* updates to segment guide

* generate

* remove og image

www/apps/resources/app/infrastructure-modules/analytics/posthog/page.mdx

@@ -174,7 +174,7 @@ export const trackOrderCreatedWorkflow = createWorkflow(
       fields: [
         "*",
         "customer.*",
-        "items.*"
+        "items.*",
       ],
       filters: {
         id: order_id,