Rename to 2017-02-09

Author: alexcrichton

_posts/2017-02-08-Rust-1.15.1.md renamed to _posts/2017-02-09-Rust-1.15.1.md

@@ -18,7 +18,7 @@ appropriate page on our website, and check out the [detailed release notes for
 1.15.1][notes] on GitHub.
 
 [install]: https://www.rust-lang.org/install.html
-[notes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1151-2017-02-08
+[notes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1151-2017-02-09
 
 ### What's in 1.15.1 stable