Documentation: broken links automatic report

[github-actions]

Summary

Status	Count
🔍 Total	430
✅ Successful	417
⏳ Timeouts	0
🔀 Redirected	0
👻 Excluded	10
❓ Unknown	0
🚫 Errors	2

Errors per input

Errors in docs/content/en/_index.html

• [405] https://formspree.io/f/xbjnwnjb | Failed: Network error: Method Not Allowed
• [404] https://github.com/cilium/tetragon/releases/download/ | Failed: Network error: Not Found
  Full Github Actions output