Rust 1.85 is out today and it is also the release that stabilizes the Rust 2024 Edition.
Rust 1.85 stabilizes the Rust 2024 Edition as the opt-in changes for Rust to avoid risking backwards compatibility. The Rust 2024 Edition has a number of language changes, new standard library additions, Cargo now provides a Rust-version aware resolver, Rustfmt formatting updates, and more. Details on the Rust 2024 Edition changes via doc.rust-lang.org.
Rust 1.85 also adds async closures, hiding trait implementations from diagnostics via a new attribute, and other new stabilized APIs.
More information on the many Rust 1.85 changes via Rust-Lang.org.