Update index.html

Author: lrubens

index.html

@@ -1162,7 +1162,7 @@ <h3> HypperMapper </h3>
       <article id="talks">
         <h2 class="major">Talks</h2>
 
-        <h3>Spring 2024:</h3>
+        <h3>Summer 2024:</h3>
 
         <div class="schedule">
           <table>