Fix lychee install workflows

[glenn-jocher]

Summary\n- Extract the lychee binary from the nested release archive path in both link workflows\n- Match the working handbook install command pattern\n\n## Tests\n- actionlint -ignore SC2004 -ignore SC2086 -ignore SC2129 .github/workflows/links.yml .github/workflows/links_local.yml\n- git diff --check -- .github/workflows/links.yml .github/workflows/links_local.yml\n- Verified latest lychee archive contains lychee-x86_64-unknown-linux-gnu/lychee\n\nNote: plain actionlint still reports pre-existing ShellCheck warnings in .github/workflows/links.yml unrelated to this change.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

🔧 This PR improves the docs link-checking workflows by fixing how the lychee link checker is installed in GitHub Actions, making CI runs more reliable.

📊 Key Changes

• Updated the lychee installation step in both .github/workflows/links.yml and .github/workflows/links_local.yml.
• Changed the extraction command to unpack only the lychee binary from the downloaded archive instead of extracting the full archive directly into /usr/local/bin.
• Added --strip-components=1 so the binary is placed in the correct location without nested folders.
• Kept the rest of the link-checking workflow unchanged, including dependency installation and local/remote link validation steps.

🎯 Purpose & Impact

• ✅ Fixes a workflow setup issue that could prevent the link checker from being installed correctly.
• 🚀 Makes automated link validation more dependable for the ultralytics/docs repository.
• 🛠️ Reduces CI failures caused by archive structure differences, helping contributors and maintainers catch real broken links instead of setup errors.
• 📚 Improves the overall stability of documentation quality checks, which supports a smoother docs publishing process.

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	Apr 25, 2026 1:10pm

[UltralyticsAssistant]

👋 Hello @glenn-jocher, thank you for submitting a ultralytics/docs 🚀 PR! This is an automated message to help streamline review, and an engineer will assist you soon. Please review the checklist below for a smooth integration ✨

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[UltralyticsAssistant]

🔍 PR Review

_{Made with ❤️ by Ultralytics Actions}

The PR looks clean. The updated workflow commands consistently extract only the lychee binary into /usr/local/bin, and I don't see any clear correctness, reliability, or maintainability issues in the changed lines.

[UltralyticsAssistant]

🎉 Merged—thank you, @glenn-jocher!

“Quality is not an act, it is a habit.” — Aristotle

This update is a great example of that mindset: a small but important workflow fix that makes link-checking more reliable, reduces avoidable CI noise, and helps the ultralytics/docs repo stay focused on catching real issues. Really appreciate the careful improvement to the lychee install step and the continued attention to docs quality.