Fix Wasm f*_sqrt() doc

[daxpedda]

Caught in rust-lang/rust#134333.

While trying to figure out why this what not caught in the CI, I was unable to reproduce the error locally, cargo doc --target wasm32-unknown-unknown doesn't seem to do the trick. Maybe something to do with how stdarch interacts with core I don't understand.

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[Amanieu]

You need to enable the rustdoc::broken-intra-doc-links lint which I believe is not enabled by default. See https://stackoverflow.com/questions/70511431/how-can-i-make-the-rustdocbroken-intra-doc-links-lint-an-error-from-the-comm.

[daxpedda]

You need to enable the rustdoc::broken-intra-doc-links lint which I believe is not enabled by default.

Apologies, I should have mentioned, I already tried that by adding #![deny(rustdoc::broken_intra_doc_links)] and RUSTDOCFLAGS=-Drustdoc::broken_inta_doc_links. Also tried with rustdoc::all (which showed a bunch of other issues, but not that one, which I also made sure of by temporarily fixing all the other issues).

I also made sure that the functions were compiled in the first place by adding a compile_error! inside a function, which correctly triggered. Also added #![feature(wasm_numeric_instr)] just to stave off any lingering paranoia.

[Amanieu]

Fair enough, I don't know why it isn't working then.