### Bug description

I recently reinstalled quarto and now the render function is no longer working. When I use the CLI or the render button I get `YAMLError: bad indentation of a mapping entry at line 5, column 10:
      jupyter: python3`

I've rendered these same files before, using the current indents (or lack thereof), and even when I try various combinations of single, double indent or spaces, the same error appears. I'm not sure what's gone wrong.

Trying to attach a .qmd says that the file is not supported [index.txt](https://github.com/quarto-dev/quarto-cli/files/11436666/index.txt)

I'm using Windows 10, VS Code
```
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: 1.3.319
      Path: C:\Users\Welp Windows 10\AppData\Local\Programs\Quarto\bin
      CodePage: 1252

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

[>] Checking Python 3 installation....OK
      Version: 3.11.1
      Path: C:/Users/Welp Windows 10/AppData/Local/Programs/Python/Python311/python.exe
      Jupyter: 5.1.3
      Kernels: python3

(\) Checking Jupyter engine render....0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.
[>] Checking Jupyter engine render....OK

[>] Checking R installation...........(None)
```

### 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.
cscheid
2023-05-09T22:42:30Z
wafflesatdawn
bug
closed
bad indentation error when rendering
https://github.com/quarto-dev/quarto-cli/issues/5476