`self-contained-math:true` in `reveal.js` format still require internet access

Bug description

When creating presentations with formulas in the reveal.js format, the formulas do not render without Internet access, even if you specify self-contained-math: true.

The presentation file always requests the address https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS_HTML-full and without Internet access the formulas are not rendered.

Steps to reproduce

1. Create new default project
2. Modify _quarto.yml

project:
  title: "Test"

format:
  revealjs: 
    embed-resources: true
    self-contained-math: true 

3. Create index.qmd

---
title: "Test"
---

## Math

$$x^2$$

4. Render project quarto render
5. Open index.html
6. See request to Internet in developer console (F12)
7. Or disconnect from Internet and see not rendered math on slide

Expected behavior

Math rendered offline

Actual behavior

Math do not render offline

Your environment

OS: Arch Linux
IDE: VsCode

Quarto check output

Quarto 1.5.29
[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.11: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.41.0: OK
      Typst version 0.11.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 1.5.29
      Path: /opt/quarto/bin

[✓] Checking tools....................OK
      Chromium: 869685
      TinyTeX: (not installed)

[✓] Checking LaTeX....................OK
      Using: Installation From Path
      Path: /usr/bin
      Version: undefined

[✓] Checking basic markdown render....OK

[✓] Checking Python 3 installation....OK
      Version: 3.11.8
      Path: /usr/bin/python3
      Jupyter: 5.7.2
      Kernels: haskell, python3

[✓] Checking Jupyter engine render....OK

[✓] Checking R installation...........OK
      Version: 4.3.3
      Path: /usr/lib64/R
      LibPaths:
        - /home/andrei/R/x86_64-pc-linux-gnu-library/4.3
        - /usr/lib/R/library
      knitr: 1.45
      rmarkdown: 2.25

[✓] Checking Knitr engine render......OK