Updating instructions to find the Terminal button

The Glitch interface changed slightly.

Author: bcopy

en/chromebook_setup/instructions.md

@@ -66,7 +66,7 @@ bigger.
 1. Go to [Glitch.com](https://glitch.com/)
 2. Sign up for an account (https://glitch.com/signin) or use your GitHub account if you have one (see GitHub instructions below).
 3. Click _New Project_ and choose _hello-webpage_
-4. Click Terminal button (at the bottom left side of the window) to open terminal window with prompt like this:
+4. Click on the `Tools` dropdown list (at the bottom left side of the window), then on `Terminal` button to open terminal tab with a prompt like this:
 
 {% filename %}Terminal{% endfilename %}
 ```