Replace dependency @material-ui/icons with @mui/icons-material

Author: renovate[bot]

app/launch/package.json

@@ -5,7 +5,7 @@
     "homepage": "https://start.grails.org",
     "dependencies": {
         "@material-ui/core": "^4.11.4",
-        "@material-ui/icons": "^4.11.2",
+        "@mui/icons-material": "^5.0.0",
         "@material-ui/lab": "^4.0.0-alpha.58",
         "materialize-css": "^1.0.0",
         "react": "^17.0.2",