Change "sold out" to "virtual tickets available" (#185)

Author: gtca

layouts/partials/main/chip.html

@@ -1,7 +1,7 @@
 <div id="chip-announcement" class="row w-90 align-middle">
   <div class="event-chip">
     <div class="event-date">November 17 - 19</div>
-    <div class="event-text">scverse conference 2025: sold out! <span class="arrow">→</span></div>
+    <div class="event-text">scverse conference 2025: virtual tickets available! <span class="arrow">→</span></div>
     <a href="/conference2025"></a>
   </div>
 </div>