Update dependency @angular/forms to v15

frontend/package-lock.json

@@ -521,9 +521,9 @@
       }
     },
     "@angular/forms": {
-      "version": "14.2.2",
-      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-14.2.2.tgz",
-      "integrity": "sha512-lq6PpLMNfs0KcIhkQrUVfKuP4hZSeUQyKOErvoLrPhDiakvOWYoQZKh6XHsbQRcuhWKHy6IITldz6sg8pWVrTw==",
+      "version": "15.0.3",
+      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-15.0.3.tgz",
+      "integrity": "sha512-oPc1lpXvwFM1QHPxsayIlZ9C4/mmFrvdnSV/x/IzHDZpgqZyLT2rnDJxqpxn7KCcn71bPdU94fKTI6Fbnkj/dQ==",
       "requires": {
         "tslib": "^2.3.0"
       }

frontend/package.json

@@ -17,7 +17,7 @@
     "@angular/common": "~14.2.0",
     "@angular/compiler": "~14.2.0",
     "@angular/core": "~14.2.0",
-    "@angular/forms": "~14.2.0",
+    "@angular/forms": "~15.0.0",
     "@angular/material": "^15.0.0",
     "@angular/platform-browser": "~14.2.0",
     "@angular/platform-browser-dynamic": "~14.2.0",