Code blocks in collapsible sections render before section

[CosmicHorrorDev]

Repro

<details>
<summary>Repro</summary>

Before the code block

```rust
fn main() {}
```

After the code block

</details>

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Rendered by GitHub

Repro

Before the code block

fn main() {}

After the code block

---

Rendered by inlyne

[kokoISnoTarget]

Is this up to date?

Tested with 4.1

[CosmicHorrorDev]

Thanks for checking! It does look like this got fixed at some point 😅