[chainlink] check links on edu.chainguard.dev

[github-actions]

Unchecked URLs:

[]

404 URLs

- url: https://fluxcd.io/flux/components/image/imageupdateautomations/
  files:
    - ../../content/chainguard/chainguard-images/staying-secure/updating-images/strategies-tools-updating-images/index.md
- url: https://www.cyber.mil/stigs/
  files:
    - ../../content/chainguard/chainguard-images/features/image-stigs.md
- url: https://auth0.com/docs/authenticate/protocols/openid-connect-protocol
  files:
    - ../../content/open-source/sigstore/fulcio/an-introduction-to-fulcio/index.md
- url: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/#create-a-pod-that-uses-your-secret
  files:
    - ../../content/chainguard/chainguard-images/chainguard-registry/authenticating/index.md
- url: https://falco.org/
  files:
    - ../../content/chainguard/chainguard-images/staying-secure/cve-risk.md
- url: https://kubernetes.io/docs/tasks/tools/install-kubectl/
  files:
    - ../../content/chainguard/chainguard-images/getting-started/cilium/index.md
    - ../../content/chainguard/chainguard-images/getting-started/istio.md
- url: https://www.fefe.de/dietlibc/
  files:
    - ../../content/chainguard/chainguard-images/about/images-compiled-programs/glibc-vs-musl.md
- url: /chainguard/libraries/overview
  files:
    - ../../content/chainguard/libraries/verification.md
- url: /software-security/learning-labs/ll202506
  files:
    - ../../content/chainguard/libraries/verification.md
- url: /chainguard/libraries/python/overview
  files:
    - ../../content/chainguard/libraries/cve-remediation.md
- url: https://www.cyber.mil/stigs/downloads/
  files:
    - ../../content/chainguard/chainguard-images/features/image-stigs.md

Notes

Add any of the unchecked or 404 URLs to ignore.json as required

[SharpRake]

All the links caught here work correctly. I'm not changing the relative links that don't have a trailing /, as I need some such examples to test against as I work on updating the chainlink tool (pr)