Bump @angular/material in /web_embedding/ng-flutter

Bumps [@angular/material](https://github.com/angular/components) from 19.2.18 to 20.0.1.
- [Release notes](https://github.com/angular/components/releases)
- [Changelog](https://github.com/angular/components/blob/main/CHANGELOG.md)
- [Commits](angular/components@19.2.18...20.0.1)

---
updated-dependencies:
- dependency-name: "@angular/material"
  dependency-version: 20.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

web_embedding/ng-flutter/package.json

@@ -17,7 +17,7 @@
     "@angular/compiler": "^19.0.0",
     "@angular/core": "^19.0.3",
     "@angular/forms": "^19.0.1",
-    "@angular/material": "^19.0.2",
+    "@angular/material": "^20.0.1",
     "@angular/platform-browser": "^19.0.3",
     "@angular/platform-browser-dynamic": "^19.0.0",
     "@angular/router": "^19.0.1",