chore(deps-dev): bump @angular/platform-server from 21.2.8 to 21.2.9

Bumps [@angular/platform-server](https://github.com/angular/angular/tree/HEAD/packages/platform-server) from 21.2.8 to 21.2.9.
- [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/v21.2.9/packages/platform-server)

---
updated-dependencies:
- dependency-name: "@angular/platform-server"
  dependency-version: 21.2.9
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -96,7 +96,7 @@
     "@angular/forms": "21.2.8",
     "@angular/platform-browser": "21.2.8",
     "@angular/platform-browser-dynamic": "21.2.8",
-    "@angular/platform-server": "21.2.8",
+    "@angular/platform-server": "21.2.9",
     "@angular/router": "21.2.8",
     "@angular/ssr": "21.2.7",
     "@axe-core/playwright": "4.11.1",