JupyterBook doesn't recognize holoviz mimetypes #187
Description
WARNING: skipping unknown output mime type: application/vnd.holoviews_load.v0+json [mystnb.unknown_mime_type]
https://github.com/snowex-hackweek/website-2024/actions/runs/10392037989/job/28776338338?pr=11
ref: executablebooks/MyST-NB#481
Can suppress this (as done in xarray tutorial)
https://github.com/xarray-contrib/xarray-tutorial/blob/08e762ead64fd598799f135068b15e8edfc8c37e/_config.yml#L77-L78