Update angular.json

Author: Pholith

angular.json

@@ -15,7 +15,7 @@
       "prefix": "app",
       "architect": {
         "build": {
-          "builder": "@angular/build:application",
+          "builder": "@angular-devkit/build-angular:application",
           "options": {
             "baseHref": "/Portfolio/",
             "outputPath":