[rustdoc] Cannot select search bar in core crate

[tesuji]

Steps to reproduce:

• Open https://doc.rust-lang.org/nightly/core/index.html
• Click in search bar, which doesn't work. Also the 'S' shortcut doesn't work.

cc @GuillaumeGomez

[tesuji]

Maybe it's #66514 to blame.

[hellow554]

Works for me :/ caching issues? Have you tried ctrl+F5?

[tesuji]

Yeah. Clearing cache is helpful. Closing as that.