Update json-endpoint.mdx

Author: kathayl

src/content/docs/browser-rendering/rest-api/json-endpoint.mdx

@@ -354,3 +354,8 @@ In this example, Browser Rendering first calls Anthropic's Claude Sonnet 4 model
   file="setting-custom-user-agent"
   product="browser-rendering"
 />
+
+<Render
+  file="faq"
+  product="browser-rendering"
+/>