title: How to use percentage scale with Chart.js
body: <p>I tried to look it up in the documentation (all examples I found elsewhere did not work anymore, probably due to an outdated syntax for earlier versions) how to use "scaleLabel", but there it references to the scale title configuration with a link which does not exist (anymore):
  <a href="http://www.chartjs.org/docs/#scale-title-configuration" rel="noreferrer">http://www.chartjs.org/docs/#scale-title-configuration</a></p>
  
  <p><strong>Can someone please provide a working example?</strong></p>