[None][docs] fix VisualGen NVL72 config .yml → .yaml in blog25

[imitater-dou]

Summary

docs/source/blogs/tech_blog/blog25_Scaling_Video_Generation_Across_NVL72_Rack_with_TensorRT-LLM.md still points at VisualGen NVL72 recipe files with a .yml suffix. On main those configs are .yaml, so the blob links and SERVER_CONFIG export 404.

Retarget three sites:

• examples/visual_gen/configs/wan22_t2v_bf16_gb200_nvl72.yml → .yaml (link + export SERVER_CONFIG=...)
• examples/visual_gen/configs/cosmos3_t2v_bf16_gb200_nvl72.yml → .yaml

Repro

At HEAD 96a25c48b258:

# stale (404)
curl -sI https://raw.githubusercontent.com/NVIDIA/TensorRT-LLM/main/examples/visual_gen/configs/wan22_t2v_bf16_gb200_nvl72.yml | head -1
curl -sI https://raw.githubusercontent.com/NVIDIA/TensorRT-LLM/main/examples/visual_gen/configs/cosmos3_t2v_bf16_gb200_nvl72.yml | head -1

# live (200)
curl -sI https://raw.githubusercontent.com/NVIDIA/TensorRT-LLM/main/examples/visual_gen/configs/wan22_t2v_bf16_gb200_nvl72.yaml | head -1
curl -sI https://raw.githubusercontent.com/NVIDIA/TensorRT-LLM/main/examples/visual_gen/configs/cosmos3_t2v_bf16_gb200_nvl72.yaml | head -1

# docs still cite .yml
rg -n 'wan22_t2v_bf16_gb200_nvl72\.yml|cosmos3_t2v_bf16_gb200_nvl72\.yml' \
  docs/source/blogs/tech_blog/blog25_Scaling_Video_Generation_Across_NVL72_Rack_with_TensorRT-LLM.md

Test plan

• Confirm PR diff only touches blog25 and only changes .yml → .yaml for those two config basenames
• Confirm linked .yaml paths resolve on main

Dev Engineer Review

The blog now uses .yaml paths for the Wan2.2, Cosmos3, and serving configuration files. This restores valid blob links and aligns SERVER_CONFIG with the filenames on main. No runtime logic or performance behavior changed.

QA Engineer Review

No test changes.

Per-File QA Perspective

• docs/source/blogs/tech_blog/blog25_Scaling_Video_Generation_Across_NVL72_Rack_with_TensorRT-LLM.md: Verify that all updated .yaml links resolve and that the documented SERVER_CONFIG value matches the available recipe filename. The change affects documentation references only.

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• docs/source/blogs/tech_blog/blog25_Scaling_Video_Generation_Across_NVL72_Rack_with_TensorRT-LLM.md

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Walkthrough

Changes

Documentation configuration links

Layer / File(s)	Summary
Update configuration references docs/source/blogs/tech_blog/blog25_Scaling_Video_Generation_Across_NVL72_Rack_with_TensorRT-LLM.md	Three configuration references now use .yaml instead of .yml.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Merge Risk: ⚪ Minimal · up to bc1fd

This documentation-only update corrects configuration filenames for benchmark and serving instructions, restoring the intended references without affecting runtime behavior. No merge-blocking risk remains.

Suggested reviewers: bowenfu

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies a documentation fix for stale VisualGen NVL72 configuration extensions and follows the required [ticket][type] format.
Description check	✅ Passed	The description explains the stale links, lists the affected configuration references, provides reproduction commands, and includes a relevant test plan. It does not use the template headings or inclu…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[brnguyen2]

Checked against the tree: both configs exist as .yaml, and a repo-wide grep for visual_gen/configs/*.yml comes back empty after this change, so all three stale sites are covered. The SERVER_CONFIG fix matters most — that one silently breaks the sbatch run, not just a link.