lang/rust: Update to 1.97.1
Announce: https://blog.rust-lang.org/2026/07/09/Rust-1.97.0/
https://blog.rust-lang.org/2026/07/16/Rust-1.97.1/
ChangeLog: https://github.com/rust-lang/rust/releases/tag/1.97.0
https://github.com/rust-lang/rust/releases/tag/1.97.1
PR: 296645
Tested by: mikael,pkubaj