445e3841da
Fix the stability attributes for `std::os::fd`. As `@bjorn3` pointed out [here], I used the wrong stability attribute in #98368 when making `std::os::fd` public. I set it to Rust 1.63, which was when io-safety was stabilized, but it should be Rust 1.66, which was when `std::os::fd` was stabilized. [here]: https://github.com/rust-lang/rust/pull/98368#discussion_r1063721420