CI suddenly began spuriously failing on macos-latest, and it doesn't seem to be related to any changes we made here.
Here's the log of our last successful run: https://github.com/arviz-devs/ArviZPythonPlots.jl/actions/runs/19825065341/job/56796250228
And here's the log of our first failing run: https://github.com/arviz-devs/ArviZPythonPlots.jl/actions/runs/19825503542/job/56809231189

The failure is always due to a 403 response when attempting to download either of the remote datasets in ArviZExampleData: https://github.com/arviz-devs/ArviZPythonPlots.jl/actions/runs/19825503542/job/56809231189#step:7:574. The downloads succeed on ubuntu-latest. Curiously, ArviZExampleData's CI runs on macos-latest and verifies that all remote and local datasets can be loaded, so it's really just here that we're seeing an error. We currently have no caches for the macos-latest runs, so a corrupted cache is not the issue. My best guess is that some permissions change happened somewhere.

I'm hoping that this just resolves itself with time.