Apply suggestions from code review

Signed-off-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

Author: hmellor

docs/training/trl.md

@@ -21,10 +21,9 @@ To enable vLLM in TRL, set the `use_vllm` flag in the trainer configuration to `
 
 Some trainers also support **vLLM sleep mode**, which offloads parameters and caches to GPU RAM during training, helping reduce memory usage. Learn more in the [memory optimization docs](https://huggingface.co/docs/trl/main/en/reducing_memory_usage#vllm-sleep-mode).
 
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 !!! info
     For more information on the `use_vllm` flag you can provide to the configs of these online methods, see:
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     - [`trl.GRPOConfig.use_vllm`](https://huggingface.co/docs/trl/main/en/grpo_trainer#trl.GRPOConfig.use_vllm)
     - [`trl.OnlineDPOConfig.use_vllm`](https://huggingface.co/docs/trl/main/en/online_dpo_trainer#trl.OnlineDPOConfig.use_vllm)
     - [`trl.RLOOConfig.use_vllm`](https://huggingface.co/docs/trl/main/en/rloo_trainer#trl.RLOOConfig.use_vllm)