[Bug report] line number display error

[rainbowatcher]

✅ Checklist

• [X] I am using the latest version

🔎 Description

Concise Description

all the line numbers are "1"

Expected behavior

show Line numbers by order.

Steps to reproduce

empty

Screenshots or Screen Recording (if possible)

demo：https://blog-with-rainbow.vercel.app/post/2022/05/20/about-this-blog/#%E7%8E%AF%E5%A2%83%E5%87%86%E5%A4%87

📄 Environment info (npx vuepress info)

System:
    OS: macOS 12.3.1
    CPU: (8) x64 Intel(R) Core(TM) i7-1068NG7 CPU @ 2.30GHz
    Memory: 39.80 MB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 16.14.2 - ~/.nvm/versions/node/v16.14.2/bin/node
    Yarn: 1.22.15 - ~/.nvm/versions/node/v16.14.2/bin/yarn
    npm: 8.10.0 - ~/.nvm/versions/node/v16.14.2/bin/npm
  Utilities:
    Git: 2.32.1 - /usr/bin/git
  Browsers:
    Chrome: 101.0.4951.64
    Edge: Not Found
    Firefox: Not Found
    Safari: 15.4
  npmPackages:
    @vuepress/bundler-vite:  2.0.0-beta.45 
    @vuepress/bundler-webpack: Not Found
    @vuepress/cli:  2.0.0-beta.45 
    @vuepress/client:  2.0.0-beta.45 
    @vuepress/core:  2.0.0-beta.45 
    @vuepress/markdown:  2.0.0-beta.45 
    @vuepress/plugin-active-header-links:  2.0.0-beta.45 
    @vuepress/plugin-back-to-top:  2.0.0-beta.45 
    @vuepress/plugin-container:  2.0.0-beta.45 
    @vuepress/plugin-docsearch: Not Found
    @vuepress/plugin-external-link-icon:  2.0.0-beta.45 
    @vuepress/plugin-git:  2.0.0-beta.45 
    @vuepress/plugin-google-analytics:  2.0.0-beta.45 
    @vuepress/plugin-medium-zoom:  2.0.0-beta.45 
    @vuepress/plugin-nprogress:  2.0.0-beta.45 
    @vuepress/plugin-palette:  2.0.0-beta.45 
    @vuepress/plugin-prismjs:  2.0.0-beta.45 
    @vuepress/plugin-pwa:  2.0.0-beta.45 
    @vuepress/plugin-pwa-popup:  2.0.0-beta.45 
    @vuepress/plugin-register-components: Not Found
    @vuepress/plugin-search: Not Found
    @vuepress/plugin-shiki: Not Found
    @vuepress/plugin-theme-data:  2.0.0-beta.45 
    @vuepress/plugin-toc: Not Found
    @vuepress/shared:  2.0.0-beta.45 
    @vuepress/theme-default:  2.0.0-beta.45 
    @vuepress/utils:  2.0.0-beta.45 
    vue:  3.2.35 
    vue-loader: Not Found
    vue-router:  4.0.15 
    vuepress: ^2.0.0-beta.45 => 2.0.0-beta.45 
    vuepress-vite:  2.0.0-beta.45 
    vuepress-webpack: Not Found

🔗 Reproduction link / repo:

No response