Bump @angular/platform-server in /js-sdk-framework-tests/angular

Bumps [@angular/platform-server](https://github.com/angular/angular/tree/HEAD/packages/platform-server) from 20.1.0 to 20.3.0.
- [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/20.3.0/packages/platform-server)

---
updated-dependencies:
- dependency-name: "@angular/platform-server"
  dependency-version: 20.3.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

js-sdk-framework-tests/angular/package.json

@@ -28,7 +28,7 @@
     "@angular/core": "20.1.0",
     "@angular/forms": "20.1.0",
     "@angular/platform-browser": "20.1.0",
-    "@angular/platform-server": "20.1.0",
+    "@angular/platform-server": "20.3.0",
     "@angular/router": "20.1.0",
     "@angular/ssr": "20.1.1",
     "express": "5.1.0",