Output files open path error (%5C instead of backslash issue)

[snn2spade]

Description

Reproduce

1. Go create some job
2. Download output file (Notebook/ HTML)
3. Found Unhandled error

Expected behavior

No Unhandled error popup

Context

• Operating System and version: Window10
• Browser and version: Chrome Version 118.0.5993.71 (Official Build) (64-bit)
• Jupyter Server version: Jupyter lab version 4.0.8

Browser Output

Paste the output from your browser Javascript console here, if applicable.
![error](https://github.com/jupyter-server/jupyter-scheduler/assets/13539556/52fb9603-8f0b-49c7-bacb-e590b0d3fe64)

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[andrii-i]

Hi @snn2spade. Thank you for opening this issue and reporting this problem. I apologize for the delay in response. I can reliably reproduce this bug on Windows 11 (when not using Windows Subsystem for Linux).

[Orchid420]

same here.