Add AWS SM HF vLLM Inference DLC details

[ehcalabres]

Description

This PR adds the new SageMaker DLC information to our AWS docs

---

Note

Low Risk
Documentation-only update; no runtime or behavior changes, with risk limited to potential URI/version typos.

Overview
Adds a new Hugging Face vLLM Inference DLC section to the SageMaker DLC availability docs, listing GPU and Neuron container image URIs (with vLLM versions) for serving text-generation models.

Also fixes minor formatting at the end of available.md (newline/whitespace).

^{Written by Cursor Bugbot for commit cd08afa. This will update automatically on new commits. Configure here.}

[HuggingFaceDocBuilderDev]

The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update.