### Bug description

When trying to render a document with a Graphviz code block on Windows 10 and error is produced.
This is in the latest build (0.9.629)

possibly related to [#295](https://github.com/quarto-dev/quarto-cli/issues/295#issue-1117132844)

Simple example:

``````
# a header text 
some text 
```{dot} 
    digraph { a -> b } 
``` 
``````

Renders fine on Mac, but on Windows returns:

```
ERROR: TypeError: Unsupported scheme "c" for module "c:\<snip>\AppData\Local\Programs\Quarto\share\js\graphviz-wasm.js". Supported schemes: [
    "data",
    "blob",
    "file",
    "http",
    "https",
]
```


quarto check: 

```
[>] Checking Quarto installation......OK
      Version: 0.9.629
      Path: C:\<snip>\AppData\Local\Programs\Quarto\bin\
      CodePage: 1252

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

[>] Checking Python 3 installation....OK
      Version: 3.10.5
      Path: C:/<snip>/AppData/Local/Programs/Python/Python310/python.exe
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with py -m pip install jupyter

[>] Checking R installation...........OK
      Version: 4.2.0
      Path: C:/PROGRA~1/R/R-42~1.0
      LibPaths:
        - C:/<snip>/AppData/Local/R/win-library/4.2
        - C:/Program Files/R/R-4.2.0/library
      rmarkdown: 2.14

[>] Checking Knitr engine render......OK
```

### Checklist

- [X] [formatted your issue](https://yihui.org/issue/#please-format-your-issue-correctly) so it is easier for us to read?
- [X] included a minimal, self-contained, and reproducible example?
- [X] documented the quarto version you're running, by providing the output produced by `quarto check` in a terminal in your issue?
- [X] documented the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] documented which operating system you're running? If on Linux, please provide the specific distribution as well.
- [X] upgraded to the latest version, including your versions of R, the RStudio IDE, and relevant R packages?
2022-06-30T05:05:20Z
dan-cloney
bug
closed
TypeError: Unsupported scheme when using Graphviz on Windows
https://github.com/quarto-dev/quarto-cli/issues/1255