add cellular_raza to showcase exampleSite

exampleSite/content/showcase/index.md

@@ -12,6 +12,13 @@ Open source projects powered by Hextra
 </p>
 
 {{< cards >}}
+  {{< card
+        link="https://github.com/jonaspleyer/cellular_raza"
+        title="cellular_raza"
+        image="/images/cellular_raza.png"
+        imageStyle="object-fit:cover; aspect-ratio:16/9;"
+  >}}
+
   {{< card
         link="https://github.com/mightymoud/sidekick"
         title="Sidekick"