Update dependency ng-packagr to v20.2.0 (#226)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "@types/jest": "30.0.0",
     "jest": "30.0.5",
     "jest-preset-angular": "15.0.0",
-    "ng-packagr": "20.1.0",
+    "ng-packagr": "20.2.0",
     "typescript": "5.9.2"
   }
 }