TECH_DEBT: [npm update]: Bump @angular/platform-browser in /Web/Admin.UI

Bumps [@angular/platform-browser](https://github.com/angular/angular/tree/HEAD/packages/platform-browser) from 20.3.6 to 21.0.6.
- [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/v21.0.6/packages/platform-browser)

---
updated-dependencies:
- dependency-name: "@angular/platform-browser"
  dependency-version: 21.0.6
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Web/Admin.UI/package-lock.json

@@ -17,7 +17,7 @@
     "@angular/core": "20.3.6",
     "@angular/forms": "20.3.6",
     "@angular/material": "20.2.9",
-    "@angular/platform-browser": "20.3.6",
+    "@angular/platform-browser": "21.0.6",
     "@angular/platform-browser-dynamic": "20.3.6",
     "@angular/router": "20.3.6",
     "@fireflysemantics/join": "^1.0.14",