[Bug] Some feature of codeblock not work with rose-pine-dawn theme and yaml language

[augustanational]

Checklist

• I am using LTS version of Node.js.
• I am using the latest v2 version of VuePress and VuePress official plugins.
• I am using the latest version of vuepress-theme-plume and all plugins in this repo.
• I followed the docs and I double checked my configuration.

Package name

vuepress-theme-plume

Which operating system are you using?

• macOS
• Windows
• Linux

Describe the bug

Use some feature of codeblock depend on comment character in yaml language:

```js
// Comment
      error: 'Removed', // [!code --]
      warning: 'Added' // [!code ++]
```

```yaml
# Comment
        silent: true # [!code ++]
```

Change theme to rose-pine-dawn in config.ts:

    codeHighlighter: {
      themes: { light: 'rose-pine-dawn', dark: 'rose-pine' },
    },

Diff in js work fine but not work in yaml:

Minimal reproduction

No response

Additional context

I try some other theme (ayu-light, catppuccin-latte and default vitesse-light), all work fine. Maybe only rose-pine-dawn have this issue.
I not sure this is bug of theme or bug of shiki or anything else.

[pengzhanbo]

This is an issue with the shiki theme. When highlighting [!code ++], it splits it into # and [!code ++], causing shiki's diff plugin to malfunction. This issue should be reported to shiki.