Math numbering cannot be customized

[mvuorre]

We try to prepend all cross-references in the appendices with a prefix, for example "A". This works for figures and tables etc, but not for math. In the standalone Typst template this works fine. However when going through Quarto, the intermediate Typst appears as (e.g. in current example):

#math.equation(block: true, numbering: "(1)", [ $ hat(bold(beta)) = (upright(bold(X))^T upright(bold(X)))^(- 1) upright(bold(X))^T upright(bold(Y)) $ ])<eq-appendix>

This is a bug in Quarto: quarto-dev/quarto-cli#13462