Add link to chartjs-plugin-waterfall (#4921)
Add link to chartjs-plugin-waterfall (#4921)


simonbrunel/Chart.js,touletan/Chart.js,jtcorbett/Chart.js,touletan/Chart.js,ldwformat/Chart.js,nnnick/Chart.js,chartjs/Chart.js,touletan/Chart.js,chartjs/Chart.js,chartjs/Chart.js,simonbrunel/Chart.js,jtcorbett/Chart.js,chartjs/Chart.js,ldwformat/Chart.js,supernovel/Chart.js,touletan/Chart.js,supernovel/Chart.js