change text in geopolitics

Author: lathug

website/index.html

@@ -260,7 +260,7 @@ <h2>How do geopolitical conflicts affect the Olympic Games?</h2>
       </div>
       <div class="slide" data-anchor="geopolitics-viz">
         <p class="geo-intro">
-          Click an event to explore its Olympic context. For boycott years, open a participation comparison.
+          Click on a year in the timeline to explore its Olympic context. For boycott years, open a participation comparison.
         </p>
 
         <div class="geo-layout">