fix typo

Author: Kevin Hannegan

presalytics/lib/widgets/chart.py

@@ -175,7 +175,7 @@ def standalone_html(self) -> str:
  document.addEventListener("DOMContentLoaded", (event) => { 
  var data = JSON.parse('{{data|safe}}');
 
- var aspectRatio = data.aspectRatio || 56.25;
+ var aspectRatio = data.aspectRatio || 56.25%;
 
  var chart = c3.generate(data);