chore(deps): bump @angular/platform-server from 20.3.7 to 20.3.19

Bumps [@angular/platform-server](https://github.com/angular/angular/tree/HEAD/packages/platform-server) from 20.3.7 to 20.3.19.
- [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/v20.3.19/packages/platform-server)

---
updated-dependencies:
- dependency-name: "@angular/platform-server"
  dependency-version: 20.3.19
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/angular/package.json

@@ -30,7 +30,7 @@
     "@angular/forms": "^20.2.2",
     "@angular/platform-browser": "^20.2.2",
     "@angular/platform-browser-dynamic": "^20.2.2",
-    "@angular/platform-server": "^20.2.2",
+    "@angular/platform-server": "^20.3.19",
     "@angular/router": "^20.2.2",
     "@angular/ssr": "^20.3.21",
     "@firebase-oss/ui-angular": "workspace:*",