Fix link formatting for chrispaig3/expo in README

Author: chrispaig3

README.md

@@ -262,7 +262,7 @@ See also [A comparison of operating systems written in Rust](https://github.com/
 
 * [eureka](https://crates.io/crates/eureka) — A CLI tool to input and store your ideas without leaving the terminal
 * [BenSchZA/pier](https://github.com/BenSchZA/pier) — A central repository to manage (add, search metadata, etc.) all your one-liners, scripts, tools, and CLIs [<img src="https://api.travis-ci.com/BenSchZA/pier.svg?branch=master">](https://travis-ci.com/BenSchZA/pier)
-* [chrispaig3/Expo](https://github.com/chripaig3/expo) - A Rusty CLI tool for managing the accessibility of GitHub repositories at scale.
+* [chrispaig3/expo](https://github.com/chripaig3/expo) - A Rusty CLI tool for managing the accessibility of GitHub repositories at scale.
 
 ### Security tools