Use UK spelling for organisers

index.html

@@ -167,7 +167,7 @@
         border-top: 5px solid var(--green);
       }
 
-      .panel.organizers {
+      .panel.organisers {
         border-top: 5px solid var(--amber);
       }
 
@@ -296,10 +296,10 @@
                 (keynote speakers and panelists) and the participants.
               </p>
             </article>
-            <article class="panel organizers">
-              <h3>Organizers</h3>
+            <article class="panel organisers">
+              <h3>Organisers</h3>
               <p>
-                The organizing team consists of a mix of representatives from academia and industry.
+                The organising team consists of a mix of representatives from academia and industry.
               </p>
             </article>
           </div>