Update devDependency for chart.js

Author: evertharmeling

src/Chartjs/assets/package.json

@@ -22,7 +22,7 @@
     "devDependencies": {
         "@hotwired/stimulus": "^3.0.0",
         "@types/chart.js": "^2.9.34",
-        "chart.js": "^3.4.1 <3.9",
+        "chart.js": "^4.0",
         "jest-canvas-mock": "^2.3.0",
         "resize-observer-polyfill": "^1.5.1"
     }