Preserve Markdown indentation in changelog container

[ghunteranderson]

Description

Within a changelog container, the indentation does not seem to be preserved. I notice this with indented lists and code blocks. All items in the list are moved to the root level.

---
title: 'Release Notes'
toc: 'false'
---

::: changelog

== v1.2.3

- Feature A
- Feature B
  - Note 1 on feature B
  - Node 1 on feature B

```yaml
locales:
  en_us:
    language: english
    country: us
```

:::

Notice the last two bullets are not indented and all indentation has been removed from the code snippet.

Type of change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings