Update dependency @angular/core to v21.2.4 [SECURITY]

Author: renovate[bot]

Client/package.json

@@ -16,7 +16,7 @@
   "dependencies": {
     "@angular/cdk": "21.1.4",
     "@angular/common": "21.1.4",
-    "@angular/core": "21.1.4",
+    "@angular/core": "21.2.4",
     "@angular/forms": "21.1.4",
     "@angular/platform-browser": "21.1.4",
     "@angular/platform-browser-dynamic": "21.1.4",