✏️ Fix typo (fastapi#83)

Author: ashears

README.md

@@ -69,7 +69,7 @@ Generate a backend and frontend stack using Python, including interactive API do
 
 ## How to use it
 
-Go to the directoy where you want to create your project and run:
+Go to the directory where you want to create your project and run:
 
 ```bash
 pip install cookiecutter