build(deps): bump @angular/core in /flightSelection-frontend/src/angular

Bumps [@angular/core](https://github.com/angular/angular/tree/HEAD/packages/core) from 21.0.5 to 21.2.4.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/v21.2.4/packages/core)

---
updated-dependencies:
- dependency-name: "@angular/core"
  dependency-version: 21.2.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

flightSelection-frontend/src/angular/package-lock.json

@@ -24,7 +24,7 @@
     "@angular/cdk": "^21.0.3",
     "@angular/common": "^21.0.5",
     "@angular/compiler": "^21.0.5",
-    "@angular/core": "^21.0.5",
+    "@angular/core": "^21.2.4",
     "@angular/forms": "^21.0.5",
     "@angular/material": "^21.0.3",
     "@angular/material-luxon-adapter": "^21.0.3",