message: Fix Github link to Onur
diff: @@ -151,7 +151,7 @@ cargo run -- doc <CRATE_NAME>
  #### Contributors
  -* [Onur Aslan](https://github.com/rust-lang-nursery)
  +* [Onur Aslan](https://github.com/onur)
  * [Jon Gjengset](https://github.com/jonhoo)
  * [Sebastian Thiel](https://github.com/Byron)
  * [Guillaume Gomez](https://github.com/GuillaumeGomez)
  