Help message in compiler error leads to a 404

[tejom]

The link in the error message here

leads to a 404 page. I think it needs to be updated to point to the correct page.
I tried this code:

error[E0599]: no method named `poll` found for opaque type `impl Future<Output = u32>` in the current scope
  --> src/main.rs:10:15
   |
10 |     let b = a.poll();
   |               ^^^^ method not found in `impl Future<Output = u32>`
   |
   = help: method `poll` found on `Pin<&mut impl Future<Output = u32>>`, see documentation for `std::pin::Pin`
   = help: self type must be pinned to call `Future::poll`, see https://rust-lang.github.io/async-book/04_pinning/01_chapter.html#pinning-in-practice

I expected to see this happen: A link to a page with up to date documentation

Instead, this happened: Link lead to a 404

Meta

rustc --version --verbose:

$ rustc --version --verbose
rustc 1.90.0 (1159e78c4 2025-09-14)
binary: rustc
commit-hash: 1159e78c4747b02ef996e55082b704c09b970588
commit-date: 2025-09-14
host: x86_64-unknown-linux-gnu
release: 1.90.0
LLVM version: 20.1.8

[maplethecolor]

@rustbot claim