chore(ui-devkit): Update Angular to v15

packages/ui-devkit/package.json

@@ -36,10 +36,10 @@
     "url": "https://github.com/vendure-ecommerce/vendure/issues"
   },
   "dependencies": {
-    "@angular-devkit/build-angular": "~13.2.4",
-    "@angular/cli": "13.2.4",
-    "@angular/compiler": "13.2.3",
-    "@angular/compiler-cli": "13.2.3",
+    "@angular-devkit/build-angular": "~15.2.1",
+    "@angular/cli": "15.2.1",
+    "@angular/compiler": "15.2.1",
+    "@angular/compiler-cli": "15.2.1",
     "@vendure/admin-ui": "^2.0.0-next.28",
     "@vendure/common": "^2.0.0-next.28",
     "chalk": "^4.1.0",