RevealJS `reference-location: section` does not number correctly

Discussed in https://github.com/quarto-dev/quarto-cli/discussions/8534

---
title: test
format:
  revealjs:
    center: true
reference-location: section
---

## Slide 1

- bullet one
- bullet two^[first footnote]
- This is the third bullet

## Slide 2

more test text here^[second footnote]

This leads to wrong numbering

Either this is an issue, or we should just disallow reference-location: section as I am not sure it makes sense in revealjs context

For context, we do special processing for footnotes in format-reveal.ts when not set to document level. So probably there to handle it correctly.