docs: sync cix multistream yolo docs

[Ronin-1124]

Description of changes

更新了Orion系列多路视频识别的文档。

Agent-doc checklist

• I ran scripts/agent-doc-lint.sh on changed doc files.
• Changed page docs are not empty, include front matter, and have an H1 heading.
• Code fences in changed docs include language labels.
• I removed TODO/TBD/XXX placeholders from non-template docs.
• I reviewed whether docs/ and i18n/en/... need to be synced.
• I did not introduce new docs/i18n path drift, or I updated .github/agent-doc-drift-baseline.md intentionally.
• I did not introduce new translation placeholders, or I updated .github/agent-doc-translation-baseline.md and .github/agent-doc-translation-backlog.md intentionally.

Validation notes

• pre-commit:
• additional checks:

[Ronin-1124]

All done, ready to merge.

[ZIFENG278]

检查文件名

[tangzz-radxa]

文件名错误：克隆的仓库目录名为 cix-multistream-yolo，因此 cd 命令应改为 cd cix-multistream-yolo，而不是 cd cix-demo。请修正。

[Ronin-1124]

文件名错误：克隆的仓库目录名为 cix-multistream-yolo，因此 cd 命令应改为 cd cix-multistream-yolo，而不是 cd cix-demo。请修正。

已修正