[io-safety-link-refs: explicitly specify stable channel, just for consistency]

wchargin-branch: io-safety-link-refs
wchargin-source: 38e5a0d357e5ae6fe48b2ebe06c03138817ca51d

Author: wchargin

text/3128-io-safety.md

@@ -434,7 +434,7 @@ patiently answering my many questions!
 [`from_raw_fd`]: https://doc.rust-lang.org/stable/std/os/unix/io/trait.FromRawFd.html#tymethod.from_raw_fd
 [`from_raw_handle`]: https://doc.rust-lang.org/stable/std/os/windows/io/trait.FromRawHandle.html#tymethod.from_raw_handle
 [`from_raw_socket`]: https://doc.rust-lang.org/stable/std/os/windows/io/trait.FromRawSocket.html#tymethod.from_raw_socket
-[`std::mem::forget`]: https://doc.rust-lang.org/std/mem/fn.forget.html
+[`std::mem::forget`]: https://doc.rust-lang.org/stable/std/mem/fn.forget.html
 [`SockRef::from`]: https://docs.rs/socket2/0.4.0/socket2/struct.SockRef.html#method.from
 [`unsafe_io::OwnsRaw`]: https://docs.rs/unsafe-io/0.6.2/unsafe_io/trait.OwnsRaw.html
 [LLVM's pointer aliasing rules]: http://llvm.org/docs/LangRef.html#pointer-aliasing-rules