README: Adds link to rustix (#42)

Author: hoijui

README.md

@@ -5,7 +5,8 @@
 
 Extended utilities for working with files and filesystems in Rust.
 
-This is a fork of the [fs2-rs](https://github.com/danburkert/fs2-rs) crate, the aim for this fork is to support `async` and replace `libc` by `rustix`.
+This is a fork of the [fs2-rs](https://github.com/danburkert/fs2-rs) crate, the aim for this fork is to support `async`
+and replace `libc` by [rustix](https://github.com/bytecodealliance/rustix).
 
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