### Bug description

This qmd file will be converted to

```qmd
---
title: foo
---

foo[^1]

[^1]: bar
```

This markdown file in a Docusaurus project.

```md
---
title: foo
---

foo[1]

[1] bar
```
It is rendered as like this.

![image](https://user-images.githubusercontent.com/50911393/231739427-1b0ce6a7-2597-4216-ac75-c1259b8872b2.png)

But Docusaurus supports footnote, so I want this Markdown output...

```md
---
title: foo
---

foo[^1]

[^1]: bar
```

![image](https://user-images.githubusercontent.com/50911393/231739723-95a7b30e-ab65-4fc0-b92d-382e65f1652c.png)

I tested the latest dev version of Quarto CLI on Debian Linux.

```sh
$ quarto check

[✓] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.1: OK
      Dart Sass version 1.55.0: OK
[✓] Checking versions of quarto dependencies......OK
[✓] Checking Quarto installation......OK
      Version: 99.9.9
      Path: /tmp/quarto-cli/package/dist/bin

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

[✓] Checking Python 3 installation....OK
      Version: 3.9.2
      Path: /usr/bin/python3
      Jupyter: 5.3.0
      Kernels: python3

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

[✓] Checking R installation...........(None)

      Unable to locate an installed version of R.
      Install R from https://cloud.r-project.org/
```

### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [ ] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
- [X] Please provide the output of `quarto check` so we know which version of quarto and its dependencies you're running.
2023-04-13T11:07:47Z
eitsupi
bug docusaurus
v1.3
closed
[Docusaurus] lack of footnote support
https://github.com/quarto-dev/quarto-cli/issues/5174