docs: update CHANGELOG to 8.3.1 (#847)
docs: update CHANGELOG to 8.3.1 (#847)


davidmsibley/angularjs-portal,davidmsibley/angularjs-portal,UW-Madison-DoIT/angularjs-portal,UW-Madison-DoIT/angularjs-portal,UW-Madison-DoIT/angularjs-portal,davidmsibley/angularjs-portal,UW-Madison-DoIT/angularjs-portal,davidmsibley/angularjs-portal