createMarkdownRenderer的参数未生效

[weizwz]

Describe the bug

我尝试在项目构建时，生成rss文件。使用createMarkdownRenderer函数来渲染文章内容，传了一些md配置，但是并没有生效。

Reproduction

1. 在 docs/.vitepress/config/index.ts 配置中的 buildEnd 方法里调用生成rss的函数
2. 生成rss的函数里调用createMarkdownRenderer渲染文章，并传入md配置
3. 渲染完成生成rss文件后，md的配置并没有生效

Expected behavior

预期createMarkdownRenderer函数的参数生效

System Info

System:
    OS: macOS 15.4.1
    CPU: (10) arm64 Apple M4
    Memory: 98.05 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.18.0 - ~/.nvm/versions/node/v20.18.0/bin/node
    npm: 11.2.0 - ~/.nvm/versions/node/v20.18.0/bin/npm
    pnpm: 9.14.2 - ~/.nvm/versions/node/v20.18.0/bin/pnpm
  Browsers:
    Chrome: 135.0.7049.115

Additional context

No response

Validations

• Check if you're on the latest VitePress version.
• 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]

It currently supports singleton markdown renderer only. So only the options inferred from config are used.