In-line math blocks don't render inside collapse-by-default callouts

[jh05013]

The following code:

> [!note]- Secret facts
> $1 + 1 = 2$, but $1 + 2 != 2$.

does not render the math blocks when expanded:

For now, one can use one of the following workarounds:

Typst code blocks:
> [!note]- Secret facts
> ```typst
> $1 + 1 = 2$, but $1 + 2 != 2$.
> ```

Display math blocks:
> [!note]- Secret facts
> $$1 + 1 = 2$$, but $$1 + 2 != 2$$.

Expand by default:
> [!note]+ Secret facts
> $1 + 1 = 2$, but $1 + 2 != 2$.