Update links.yml

[glenn-jocher]

copilot:all

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced broken link checks in CI with retry capabilities.

📊 Key Changes

• 🔄 Switched from using lychee-action to manual lychee installation and execution.
• 🔄 Included a retry mechanism for link checks using nick-invision/retry.
• ⌚ Increased robustness by accepting certain failure status codes like 429 and 999 from specific platforms during checks.
• 🧰 Additional check commands now include a maximum number of attempts and introduce delay between retries.

🎯 Purpose & Impact

• 🛠️ The direct installation of lychee ensures the latest version is used and might improve reliability.
• 🔄 Retry mechanism provides resilience to temporary issues such as network flakiness, reducing false positives in broken link detection.
• ✅ By accepting specific status codes, the changes aim at reducing noise from platforms that frequently block automated testing tools (like Instagram and LinkedIn), streamlining the workflow.
• 🚀 Overall, these changes are likely to enhance the CI process for the repository, ensuring smoother and more accurate continuous integration practices. Users and developers can expect improved link checking with fewer interruptions and disruptions.