Apply suggestions from code review

Co-authored-by: Thomas de Zeeuw <[email protected]>

Author: Nugine

README.md

@@ -62,7 +62,7 @@ feature flag.
 * NetBSD
 * Redox
 * Solaris
-* [OpenHarmony](https://doc.rust-lang.org/nightly/rustc/platform-support/openharmony.html)
+* OpenHarmony
 
 # Minimum Supported Rust Version (MSRV)