Deprecated doc intra link
fixes https://github.com/rust-lang/rust/issues/98342
r? @GuillaumeGomez
Renders intra-doc links in the note text of the `#[deprecated]` attribute. It is quite natural to suggest some other function to use there. So e.g.
```rust
#[deprecated(since = "0.0.0", note = "use [`std::mem::size_of`] instead")]
```
renders as
<img width="431" height="74" alt="Screenshot from 2026-01-06 12-08-21" src="https://github.com/user-attachments/assets/8f608f08-13ee-4bbf-a631-6008058a51e2" />
Matthias Krüger
d763ffaf04