docs: clarify FLUX.2-klein HWR validation scope

Signed-off-by: hsliuustc0106 <liuhongsheng4@huawei.com>

docs/user_guide/diffusion/offloader/distributed_layerwise_offload.md

@@ -113,9 +113,10 @@ HWR is an opt-in startup optimization for models that declare the final-layout
 BF16 restore contract. Use it only with no-AllGather DLO:
 
 The validated BF16 model contracts currently cover MiniMax H3 and
-`black-forest-labs/FLUX.2-klein-4B`. FLUX.2-klein-9B, FLUX.2-dev, online FP8,
-HSDP, LoRA/adapted weights, and non-default load formats are not enabled by
-this contract.
+`black-forest-labs/FLUX.2-klein-4B`. FLUX.2-klein-9B shares the same model
+class but has not been validated against this contract. FLUX.2-dev, online
+FP8, HSDP, LoRA/adapted weights, and non-default load formats remain outside
+the validated scope.
 
 ```bash
 vllm serve /path/to/model --omni \