Switch hero image to CC0 Wikimedia Commons asset

index.html

@@ -74,7 +74,7 @@
         align-items: end;
         background:
           linear-gradient(90deg, rgba(17, 24, 39, 0.88), rgba(17, 24, 39, 0.54) 55%, rgba(17, 24, 39, 0.08)),
-          url("https://images.unsplash.com/photo-1548453230-d5e297049e6e?auto=format&fit=crop&fm=jpg&q=78&w=2200") center / cover;
+          url("https://upload.wikimedia.org/wikipedia/commons/thumb/5/50/VBZ_Tram_4035_leaving_Schiffbau%2C_Z%C3%BCrich.jpg/1280px-VBZ_Tram_4035_leaving_Schiffbau%2C_Z%C3%BCrich.jpg") center / cover;
       }
 
       .hero-inner {
@@ -313,7 +313,7 @@
 
     <footer>
       <div class="foot">
-        Hero image: Zurich tram photo by Claudio Schwarz on Unsplash.
+        Hero image: "VBZ Tram 4035 leaving Schiffbau, Zurich" by OpenCatMap, CC0 1.0 via Wikimedia Commons.
       </div>
     </footer>
   </body>