Problem

After rust-lang/rust#105036, docs of Cargo and its companion crates are live now at https://doc.rust-lang.org/nightly/nightly-rustc.

I wonder whether https://doc.crates.io/contrib/apidoc/cargo should be redirected to that "canonical" URL. It might be more discoverable as all rustc internal docs are already there, whereas the doc will only get updated when cargo gets synced into rust-lang/rust repo, which happens only once or twice a week.

Proposed Solution

Follow the steps:

1. Replace all occurrences of doc.crates.io/contrib/apidoc/cargo with doc.rust-lang.org/nightly/nightly-rustc/cargo in this repo.
2. Do a redirect in mdbook book.toml from /apidoc/cargo to https://doc.rust-lang.org/nightly/nightly-rustc/cargo.
3. Remove CI changes in ba3d2e9 and 1c82d9c.

Notes

No response