build: update cross-repo angular dependencies

See associated pull request for more information.

Author: angular-robot

packages/angular/build/package.json

@@ -54,7 +54,7 @@
     "@angular/ssr": "workspace:*",
     "jsdom": "27.1.0",
     "less": "4.4.2",
-    "ng-packagr": "21.0.0-rc.0",
+    "ng-packagr": "21.0.0-rc.1",
     "postcss": "8.5.6",
     "rxjs": "7.8.2",
     "vitest": "4.0.8"

packages/angular_devkit/build_angular/package.json

@@ -68,7 +68,7 @@
     "@angular/ssr": "workspace:*",
     "@web/test-runner": "0.20.2",
     "browser-sync": "3.0.4",
-    "ng-packagr": "21.0.0-rc.0",
+    "ng-packagr": "21.0.0-rc.1",
     "undici": "7.16.0"
   },
   "peerDependencies": {