TKE-50: fix supernode cookbook stale links

[wenjiehs]

Summary

Fixes stale supernode GPU cookbook links reported by TKE-50.

Changes

• Updated cookbook/supernode/README.md GPU documentation references from the removed /ai-ml/04-gpu-pod-best-practices/ route to the current /ai-ml/training/supernode-gpu/ route.
• Removed the stale #支持的-gpu-规格 anchor reference because the current target page has no matching section; the local README table remains the source for the listed cookbook specs.
• Converted the broken ../../LICENSE link in cookbook/supernode/README.md to plain Apache License 2.0, matching the root cookbook README license text without linking to a missing file.
• Updated directly related cookbook references in cookbook/supernode/deploy_gpu_pod.py and cookbook/supernode/gpu_pod_examples.yaml.

Doc Change Report

• Source issue: TKE-50 (a177fdf6-b9fd-4dc6-990c-bc267c3baea3)
• canonical_doc_path: cookbook/supernode/README.md
• operation_id: tke.supernode.gpu_pod.deploy
• Modified scope: cookbook/supernode/README.md, cookbook/supernode/deploy_gpu_pod.py, cookbook/supernode/gpu_pod_examples.yaml
• Fact sources:
  • src/content/docs/ai-ml/training/supernode-gpu.md (repo source; no page update timestamp in file): confirms current generated route source and title 超级节点 GPU.
  • astro.config.mjs (repo source; no page update timestamp): confirms Starlight autogenerates the ai-ml docs tree.
  • src/data/cookbooks.js (repo source; no page update timestamp): already references /ai-ml/training/supernode-gpu/ as the supernode GPU link.
  • cookbook/README.md (repo source; last updated 2026-01-07 in file): existing cookbook license section states Apache License 2.0 without a root LICENSE link.
  • npm run build output: confirms dist/ai-ml/training/supernode-gpu/index.html is generated.
• Static Compile:
  • find cookbook -name '*.py' -print0 | xargs -0 python3 -m py_compile passed.
  • ruby -e 'require "yaml"; YAML.load_stream(File.read("cookbook/supernode/gpu_pod_examples.yaml"))' passed.
  • git diff --check passed.
  • Scoped stale-link search for 04-gpu-pod-best-practices, ../../LICENSE, and 支持的-gpu-规格 in cookbook/supernode found no matches.
• Dry Run Compile:
  • npm run build passed.
  • Generated route existence check for dist/ai-ml/training/supernode-gpu/index.html passed.
  • mkdocs build --strict skipped: repository has no mkdocs.yml or mkdocs.yaml.
• Live Verify: not required; this change only updates documentation links/comments and does not create, delete, or modify Tencent Cloud/TKE resources.
• Remaining human confirmation: none for this scoped link fix. A separate legal/content decision is still needed if the repository should add a root LICENSE file instead of leaving cookbook license text unlinked.