feat: update index.html

Author: fantasticmao

docs/index.html

@@ -15,7 +15,7 @@ <h1>CSV-to-iCal</h1>
 
     <p>For more information, please visit the <a href="https://github.com/fantasticmao/csv-to-ical" target="_blank">project page</a>.</p>
 
-    <h2>Edit CSV Events</h2>
+    <h2>Edit Calendar Events</h2>
 
     <div class="my-3">
         <button id="download-btn" class="btn btn-primary btn-sm me-1">Download CSV</button>