docs: add ray and slurm link

docs/faq/faq.rst

@@ -17,3 +17,5 @@ How to run multi-node post-training with Ray?
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 You can start a ray cluster and submit a ray job, following the official guide from Ray: https://docs.ray.io/en/latest/ray-core/starting-ray.html
+
+If your cluster is managed by Slurm, please refer to the guide for deploying Ray on Slurm: https://docs.ray.io/en/latest/cluster/vms/user-guides/community/slurm.html