Maths rendering on website and models vignette

[athowes]

At the moment we have a bug on the website whereby maths isn't rendering (most notably the "guide to models" vignette).

This could relate to our choice of math-rendering:

epidist/_pkgdown.yml

Lines 1 to 4 in f5eead1

	url: https://epidist.epinowcast.org/
	template:
	package: enwtheme
	math-rendering: mathjax

But I can see that e.g. on epinowcast the settings are the same and the vignettes are up.

It could be specific to the models vignette. At a guess could try switching this off:

epidist/vignettes/model.Rmd

Lines 8 to 9 in f5eead1

	pkgdown:
	as_is: true