style: fix directory word in docs

docs/api/touch-bar.md

@@ -141,7 +141,7 @@ app.once('ready', () => {
 
 ### Running the above example
 
-To run the example above, you'll need to (assuming you've got a terminal open in the dirtectory you want to run the example):
+To run the example above, you'll need to (assuming you've got a terminal open in the directory you want to run the example):
 
 1. Save the above file to your computer as `touchbar.js`
 2. Install Electron via `npm install electron`