Bump @angular/platform-browser-dynamic from 19.2.15 to 21.2.12

Bumps [@angular/platform-browser-dynamic](https://github.com/angular/angular/tree/HEAD/packages/platform-browser-dynamic) from 19.2.15 to 21.2.12.
- [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/v21.2.12/packages/platform-browser-dynamic)

---
updated-dependencies:
- dependency-name: "@angular/platform-browser-dynamic"
  dependency-version: 21.2.12
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

apps/angular-demo/package.json

@@ -18,7 +18,7 @@
     "@angular/core": "^19.2.7",
     "@angular/forms": "^19.2.10",
     "@angular/platform-browser": "^19.2.7",
-    "@angular/platform-browser-dynamic": "^19.2.10",
+    "@angular/platform-browser-dynamic": "^21.2.12",
     "@angular/router": "^19.2.7",
     "ng-diagram": "workspace:*",
     "rxjs": "~7.8.2",

apps/docs/package.json

@@ -26,7 +26,7 @@
     "@angular/language-service": "^19.2.7",
     "@angular/material": "19.2.19",
     "@angular/platform-browser": "^19.2.7",
-    "@angular/platform-browser-dynamic": "^19.2.10",
+    "@angular/platform-browser-dynamic": "^21.2.12",
     "@angular/platform-server": "^19.2.7",
     "@astrojs/starlight": "^0.35.2",
     "@expressive-code/plugin-collapsible-sections": "^0.41.3",

packages/ng-diagram/package.json

@@ -33,7 +33,7 @@
     "@angular/core": "^19.2.7",
     "@angular/forms": "^19.2.10",
     "@angular/platform-browser": "^19.2.7",
-    "@angular/platform-browser-dynamic": "^19.2.10",
+    "@angular/platform-browser-dynamic": "^21.2.12",
     "@angular/router": "^19.2.7",
     "rxjs": "~7.8.2",
     "tslib": "^2.8.1",