[Bug] 相对路径图片无法通过 markdown-it 进行重渲染，已通过在线驱动提供最小复现项目

[LincZero]

Checklist

• [X] I am using LTS version of Node.js.
• [X] I am using the latest v2 version of VuePress and VuePress official plugins.
• [X] I am using the latest v2 version of vuepress-theme-hope and all plugins in this repo.
• [X] I followed the docs and I double checked my configuration.
• [X] I have searched FAQ and I did not find the answer.

Package name

vuepress-theme-hope

Which operating system are you using?

• [ ] macOS
• [X] Windows
• [ ] Linux

Describe the bug

在线：https://stackblitz.com/edit/vuepress-theme-hope-ly6uos?file=docs%2FREADME.md,docs%2F.vuepress%2Fconfig.ts

（该在线驱动基于https://theme-hope.vuejs.press/zh/demo/，只添加了logo.png文件，只修改了config.ts和README.md文件）

Additional context

No response

[LincZero]

补充：

• 涉及 相对路径 图片存在问题，表现为编译成功，但打开对应页面则报错
• 在线路径图片以及其他非图片，表现正常

[LincZero]

找到了，上面的最小案例其实给得不准确，最小案例错是因为我傻了调了两次oldRender。

应该要么自己处理，要么换成md.redner。自己处理的话应从env里获取 .filePathRelatie，然后再用来修改相对路径图片的url就可以了

[LincZero]

Labels should add invalid tag

[github-actions[bot]]

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