added modern screenshot with gaps for the screenshots section (#123)

Author: quantenzitrone

screenshots/i3-15.png

@@ -76,6 +76,7 @@ <h2>Screenshots</h2>
     {% 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" %}
+    {% include screenshot.html link="/screenshots/i3-15.png" thumb="/screenshots/i3-15.thumb.png" description="polybar, mpd, code-server, custom ufetch, htop" %}
 </section>
 
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