Add note about opening link in another window

Author: a-a-ron

responses/02_update-index.md

@@ -2,6 +2,8 @@
 
 Great job! Now that GitHub Pages is enabled, you can view your website here: https://{{ user.username }}.github.io/{{ repo }} 
 
+__NOTE:__ You'll be updating your GitHub Pages site in the upcoming steps. To make things easier to view, I recommend that you open this link in another tab or window for quick access to view your changes.
+
 You can customize your homepage by adding content to either an `index` file or the `README.md` file. GitHub Pages first looks for an `index` file. If an `index` file is found, GitHub Pages uses the content in the file to create the homepage. If an `index` file isn’t found, it uses the `README.md` to create the homepage.
 
 Your repository has an `index.md` file so we can update it to include your personalized content.