Clarify wording on README extensions highlight

Author: djpowers

README.md

@@ -18,7 +18,7 @@
 
 [Raycast](https://raycast.com/) lets you control your tools with a few keystrokes and installing script commands makes it possible to execute commands from anywhere on your desktop. They are a great way to speed up every-day tasks such as converting data, opening bookmarks or triggering dev workflows. This repository contains some example scripts as well as links to our community commands and documentation to write your own ones.
 
-**✨ Lookin for building more rich extension?** Check out Extensions API [here](https://github.com/raycast/extensions).
+**✨ Looking to build richer extensions?** Check out the Extensions API [here](https://github.com/raycast/extensions).
 
 🚨 For anything that is not related to script commands, please [send us an email]([email protected]), use the feedback command within Raycast, or join the [Slack community](https://www.raycast.com/community).