chore(deps): update dependency ng-packagr to v21

Author: renovate[bot]

package.json

@@ -76,7 +76,7 @@
     "karma-coverage": "2.2.1",
     "karma-jasmine": "5.1.0",
     "karma-jasmine-html-reporter": "2.1.0",
-    "ng-packagr": "20.3.2",
+    "ng-packagr": "21.0.0",
     "ts-node": "10.9.2",
     "typescript": "5.9.3"
   }