Update posts/2019-11-07-Rust-1.39.0.md

Author: Centril

posts/2019-11-07-Rust-1.39.0.md

@@ -36,7 +36,7 @@ A promise made is a promise kept. So in Rust 1.39.0, we are pleased to announce
 
 An `async` function, which you can introduce by writing `async fn` instead of `fn`, does nothing other than to return a `Future` when called. This `Future` is a suspended computation which you can drive to completion by `.await`ing it. Besides `async fn`, `async { ... }` and `async move { ... }` blocks, which act like closures, can be used to define "async literals".
 
-For more on the release of `async` / `.await`, read [Niko Matsakis's blog post].
+For more on the release of `async` / `.await`, read [Niko Matsakis's blog post][niko-post-async].
 
 ### References to by-move bindings in `match` guards