Bikeshed update fails in github actions

[pietercolpaert]

See https://github.com/TREEcg/specification/actions/runs/11691120266/job/32641173182#step:3:793

    FATAL ERROR: Something's gone wrong with the remote data; I can't read its timestamp. Please report this!

[pietercolpaert]

Is this a problem that only occurs on our installation, or does this also happen elsewhere?

[pietercolpaert]

It’s apparently a bikeshed specific failure when trying to fetch a remote manifest that doesn’t exist. See https://github.com/speced/bikeshed/blob/88058351025757bb531106476ae4b69b1d7091cf/bikeshed/update/manifest.py#L112

[pietercolpaert]

I solved it: apparently this issue is a duplicate of speced/bikeshed#2949

The solution is to use a more recent python version, which in github actions can be done by for example instead of using an old Ubuntu version, using ubuntu-latest in the runs-on field.