Add a new i3 screenshot

Author: crocket

screenshots/i3-13.png

@@ -128,6 +128,7 @@ <h2>Screenshots</h2>
 <br>
 {% include screenshot.html link="/screenshots/i3-10.png" thumb="/screenshots/i3-10.thumb.png" description="Right-to-left titles" %}
 {% include screenshot.html link="/screenshots/i3-11.jpg" thumb="/screenshots/i3-11.thumb.jpg" description="dzen2, VIM, bash, top" %}
+{% include screenshot.html link="/screenshots/i3-13.png" thumb="/screenshots/i3-13.thumb.png" description="i3pystatus, mpd, watson time tracker, nerd fonts" %}
 </div>
 
 </div>