character (%20) in markdown filename cannot work after build

[gyhyfj]

Describe the bug

For example:
If the markdown filename is 01 overview.md, and the link of this file in .vitepress/config.ts is link: 'path/to/01 overview' ,
then:

1. If I run docs:dev, I can access this page by path/to/01%20overview, everything works well.
2. If I run docs:build, it doesn't work, and return 404

Reproduction

As above

Expected behavior

blank character in markdown file's filename should still work after build

System Info

System:
    OS: Windows 10 10.0.19045
    CPU: (8) x64 Intel(R) Core(TM) i5-9300H CPU @ 2.40GHz
    Memory: 6.17 GB / 15.92 GB
  Binaries:
    Node: 18.16.0 - D:\Program Files\NodeJS\node.EXE
    npm: 9.6.4 - D:\Program Files\NodeJS\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.1266.0), Chromium (112.0.1722.58)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    vitepress: latest => 1.0.0-alpha.74

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.

[brc-dd]

IDK but having spaces in URLs seems like a pretty bad idea anyway 🤷‍♂️

[brc-dd]

Duplicate of #573