Bad character escape sequence, expected 4 hex characters

### Describe the bug

nuxt css settings cannot be set to absolute paths

### Reproduction

not work
worked

### System Info

```shell
System:
OS: Windows 11 10.0.22621
CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
Memory: 2.05 GB / 15.85 GB
Binaries:
Node: 18.19.1 - ~\AppData\Local\Volta\tools\image\node\18.19.1\node.EXE
Yarn: 1.22.18 - ~\AppData\Local\Volta\tools\image\yarn\1.22.18\bin\yarn.CMD
npm: 10.2.4 - ~\AppData\Local\Volta\tools\image\node\18.19.1\npm.CMD
pnpm: 8.15.4 - C:\Program Files\Volta\pnpm.EXE
Browsers:
Edge: Chromium (122.0.2365.66)
Internet Explorer: 11.0.22621.1
npmPackages:
vite: 5.1.5 => 5.1.5
```

### Used Package Manager

pnpm

### Validations

- [X] Follow our [Code of Conduct](https://github.com/histoire-dev/histoire/blob/main/CODE_OF_CONDUCT.md)
- [X] Read the [Contributing Guidelines](https://github.com/histoire-dev/histoire/blob/main/CONTRIBUTING.md).
- [X] Read the [docs](https://histoire.dev/guide/).
- [X] Check that there isn't [already an issue](https://github.com/histoire-dev/histoire/issues) that reports the same bug to avoid creating a duplicate.
- [X] Check that this is a concrete bug. For Q&A open a [GitHub Discussion](https://github.com/histoire-dev/histoire/discussions).
- [X] The provided reproduction is a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug.