Rustdoc `.item-decl` links are no longer highlighted

[Alexendoo]

https://doc.rust-lang.org/std/collections/struct.HashMap.html

https://doc.rust-lang.org/nightly/std/collections/struct.HashMap.html

Looks like they're losing the battle for specificity after #102924