Add multiline labelString to yAxes Chart.js

I have not found any questions on any site addressing this question, nor any documentation on how to answer it...

How do I make the y-axis in a chart made with the latest version of the Chart.js library accept a multi-line string as its labelString? I've tried

"Percent of users <br> that can come today"

as well as

"Percent of users \n that can come today" 

and

"Percent of users 
 that can come today".

Here is my code, I can add more of the code if necessary:

            yAxes: [{
                ticks: {
                    beginAtZero: true,
                    max: 100,
                    stepSize: 25,
                },
                scaleLabel: {
                    display: true,
                    fontSize: 14,
                    labelString: "Percent of users \n that can come today",
                }
            }]