【doc fix】doc fix: deepseekv3.1

[1092626063]

What this PR does / why we need it?

fix deepseekv3.1 doc

Does this PR introduce any user-facing change?

How was this patch tested?

• vLLM version: v0.11.2
• vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.2

[gemini-code-assist]

Code Review

This pull request updates the documentation for DeepSeek-V3.1, specifically for the 'Prefill-Decode Disaggregation' section. The change removes the 'Llmdatadist' option, focusing solely on 'Mooncake' for deployment, which seems appropriate given the context of the model. I've provided one comment to correct a grammatical error in the updated sentence to improve the documentation's clarity and professionalism.

[gemini-code-assist]

To improve grammatical correctness and clarity, I suggest rephrasing this sentence. The verb 'recommend' is typically followed by a gerund (e.g., 'using') rather than an infinitive ('to use'). Additionally, the noun form of the verb 'deploy' is 'deployment'.

Suggested change

	We recommend to use Mooncake for deploy: [Mooncake](./multi_node_pd_disaggregation_mooncake.md).
	We recommend using Mooncake for deployment: [Mooncake](./multi_node_pd_disaggregation_mooncake.md).

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