fix: re-generated config files

Author: guillemgt

verl/trainer/config/_generated_ppo_torchtitan_trainer.yaml

@@ -310,6 +310,7 @@ actor_rollout_ref:
       port: 9090
       file: /tmp/ray/session_latest/metrics/prometheus/prometheus.yml
       served_model_name: ${oc.select:actor_rollout_ref.model.path,null}
+      metrics_to_log: null
     quantization: null
     quantization_config_file: null
     mtp: ${oc.select:actor_rollout_ref.model.mtp, null}