[Bug report] Pages with Chinese filename don't get html suffix in URL in sidebar

[thallium]

Description

Pages with Chinese filename don't have a .html suffix in URL which will result in 404 unless the item is specified with a .md in the config file.

Reproduction

https://stackblitz.com/edit/vuepress-dfdu12?file=docs%2Fguide%2FEnglish.md,docs%2F.vuepress%2Fconfig.ts

Used Package Manager

npm

System Info

System:
    OS: macOS 12.3.1
    CPU: (8) arm64 Apple M1 Pro
    Memory: 74.73 MB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 18.0.0 - /var/folders/mz/h5dn2z4n33q5hlvbvft6xhxm0000gn/T/yarn--1652237709865-0.4698914015310165/node
    Yarn: 1.22.18 - /var/folders/mz/h5dn2z4n33q5hlvbvft6xhxm0000gn/T/yarn--1652237709865-0.4698914015310165/yarn
    npm: 8.6.0 - /opt/homebrew/bin/npm
  Utilities:
    Git: 2.32.0 - /usr/bin/git
  Browsers:
    Chrome: 101.0.4951.54
    Edge: Not Found
    Firefox: 100.0
    Safari: 15.4
  npmPackages:
    @vuepress/bundler-vite:  2.0.0-beta.43 
    @vuepress/bundler-webpack: Not Found
    @vuepress/cli:  2.0.0-beta.43 
    @vuepress/client:  2.0.0-beta.43 
    @vuepress/core:  2.0.0-beta.43 
    @vuepress/markdown:  2.0.0-beta.43 
    @vuepress/plugin-active-header-links:  2.0.0-beta.43 
    @vuepress/plugin-back-to-top:  2.0.0-beta.43 
    @vuepress/plugin-container:  2.0.0-beta.43 
    @vuepress/plugin-docsearch: Not Found
    @vuepress/plugin-external-link-icon:  2.0.0-beta.43 
    @vuepress/plugin-git:  2.0.0-beta.43 
    @vuepress/plugin-google-analytics: Not Found
    @vuepress/plugin-medium-zoom:  2.0.0-beta.43 
    @vuepress/plugin-nprogress:  2.0.0-beta.43 
    @vuepress/plugin-palette:  2.0.0-beta.43 
    @vuepress/plugin-prismjs:  2.0.0-beta.43 
    @vuepress/plugin-pwa: Not Found
    @vuepress/plugin-pwa-popup: Not Found
    @vuepress/plugin-register-components: Not Found
    @vuepress/plugin-search: Not Found
    @vuepress/plugin-shiki: ^2.0.0-beta.43 => 2.0.0-beta.43 
    @vuepress/plugin-theme-data:  2.0.0-beta.43 
    @vuepress/plugin-toc: Not Found
    @vuepress/shared:  2.0.0-beta.43 
    @vuepress/theme-default:  2.0.0-beta.43 
    @vuepress/utils:  2.0.0-beta.43 
    vue:  3.2.33 
    vue-loader: Not Found
    vue-router:  4.0.15 
    vuepress: ^2.0.0-beta.43 => 2.0.0-beta.43 
    vuepress-vite:  2.0.0-beta.43 
    vuepress-webpack: Not Found