Fix typo (#169)
Fix typo (#169)

* Fix typo

* Update CONTRIBUTING.md

Co-authored-by: Marco Ieni <fbeadb7e62f859ac2d21a9763815f40c11ce383b@users.noreply.github.com>

Co-authored-by: Marco Ieni <fbeadb7e62f859ac2d21a9763815f40c11ce383b@users.noreply.github.com>
rust-unofficial/patterns