[BUG] axio@0.2.0 builds only on nightly-2025-12-04 to nightly-2025-12-17

https://github.com/rust-lang/rust/pull/148937 (landed in nightly-2025-12-04) was reverted in https://github.com/rust-lang/rust/pull/150096 (landed in nightly-2025-12-18).