CI system failures across the org 1st Dec

[consideRatio]

It would be great to get help with any of these CI failures. To address any failure try to first understand it a bit, then think about what could make sense to do about it, and then go for it!

All of the below listed PRs are fresh CI failures that I think are unrelated to the PR change of bumping an actions/checkout github action version - you can see the CI failures from these now merged PRs.

• build(deps): bump actions/checkout from 5 to 6 docker-image-cleaner#176
• Bump actions/checkout from 5 to 6 nbgitpuller#381
• Bump actions/checkout from 5 to 6 zero-to-jupyterhub-k8s#3771
• Bump actions/checkout from 5 to 6 jupyterhub#5212
• (is this repo actively used? should we work resolving this ci failure?) Bump actions/checkout from 5 to 6 pytest-jupyterhub#102

[minrk]

at least a couple appear to have been intermittent network issues, passed on re-run.

We should maybe pause pytest-jupyterhub.