Use newer version of JQuery

Author: mernst

index.html

@@ -59,6 +59,6 @@ <h5 class="icon-title">{{ page.title }}</h5>
 
 {% include analytics.html %}
 </body>
-<script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
+<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
 <script src="site.js"></script>
 </html>