List new endpoints in Relay operating guidelines (#10349)

Author: jjbayer

docs/product/relay/operating-guidelines.mdx

@@ -93,7 +93,11 @@ SDKs communicate with Sentry on a set of endpoints. Relay provides the same API
 - `/api/<project-id>/minidump/`
 - `/api/<project-id>/security/`
 - `/api/<project-id>/store/`
-- `/api/<project-id>/unreal/`
+- `/api/<project-id>/unreal/<sentry-key>/`
+- `/api/<project-id>/nel/`
+- `/api/<project-id>/csp-report/`
+- `/api/<project-id>/cron/<monitor-slug>/`
+- `/api/<project-id>/cron/<monitor-slug>/<sentry-key>/`
 
 Depending on the SDK or client, requests to these endpoints are performed with compressed content-encoding or chunked transfer-encoding. Depending on the infrastructure in front of Relay, please check the following HTTP headers are set correctly: