Do not suggest using `Error` in `no_std` before Rust 1.81 (#13834)

changelog: [`result_unit_err`]: do not suggest using `Error` in `no_std`
mode before Rust 1.81

Fix #9767

llogiq committed 1y ago

968669b00a224d6e97439d317e7443b8493e2f1c

Committed by GitHub <noreply@github.com> on 12/16/2024, 5:15:20 AM