Intra-doc links on inline module are resolved incorrectly

[SludgePhD]

pub struct Hotkey;

/// [`Hotkey`]
pub mod key {}

rust-analyzer fails to resolve the link here, but rustdoc does it successfully.

rust-analyzer works if the link is changed to point to super::Hotkey instead, but then rustdoc complains.

[Veykril]

Ugh, we need to treat the links differently depending on whether they are inside or outside the mod, that's gonna be an ugly change.