Minor docs update (#3590)

fern/docs.yml

@@ -17,6 +17,7 @@ colors:
 analytics:
   posthog:
     api-key: ${POSTHOG_API_KEY}
+js: ./custom.js
 layout:
   page-width: 1504px
   header-height: 75px
@@ -163,6 +164,7 @@ navigation:
               - POST /v1/runs/{run_id}/cancel
               - POST /v1/runs/{run_id}/retry_webhook
               - POST /v1/run/tasks/login
+              - GET /v1/runs/{run_id}/timeline
           - section: Workflows
             contents:
               - POST /v1/run/workflows
@@ -173,6 +175,7 @@ navigation:
               - POST /v1/workflows
               - POST /v1/workflows/{workflow_id}
               - POST /v1/workflows/{workflow_id}/delete
+              - GET /v1/runs/{run_id}/timeline
           - section: Browser Sessions
             contents:
               - POST /v1/browser_sessions