Attempt to fix broken logo images

[brian-rose]

Currently the logos at the top of the published notebooks are not appearing.

I think the reason is that jupyter-book / myst-nb are not handling the relative path corrections for the html img tags because they are wrapped in an html table.

Here I try to replace the html table with a markdown table instead to see if that fixes the problem.

The way jupyter-book handles html image tags is a bit confusing. We'll see in the PR preview if this helps.

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[brian-rose]

So it turns out that removing the <img> tags from the table fixed the problem of the missing images -- but it doesn't really look as nice this way.

It would be better to have more fine-grained control over image placement, but I don't know how to do that in a way that plays well with Jupyter Book.

[ktyle]

Thanks @brian-rose that will do for now.