Update index.html

index.html

@@ -40,7 +40,7 @@
   <script src="./static/js/bulma-slider.min.js"></script>
   <script src="./static/js/index.js"></script>
   <script type="text/javascript"
-            src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG">
+            src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG">
     </script>
 
     <!-- <script type="text/x-mathjax-config">