chore(deps)(deps-dev): Bump @angular-eslint/eslint-plugin-template

Bumps [@angular-eslint/eslint-plugin-template](https://github.com/angular-eslint/angular-eslint/tree/HEAD/packages/eslint-plugin-template) from 20.6.0 to 21.0.1.
- [Release notes](https://github.com/angular-eslint/angular-eslint/releases)
- [Changelog](https://github.com/angular-eslint/angular-eslint/blob/main/packages/eslint-plugin-template/CHANGELOG.md)
- [Commits](https://github.com/angular-eslint/angular-eslint/commits/v21.0.1/packages/eslint-plugin-template)

---
updated-dependencies:
- dependency-name: "@angular-eslint/eslint-plugin-template"
  dependency-version: 21.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -56,7 +56,7 @@
   "devDependencies": {
     "@angular-eslint/builder": "^20.6.0",
     "@angular-eslint/eslint-plugin": "^21.0.1",
-    "@angular-eslint/eslint-plugin-template": "^20.6.0",
+    "@angular-eslint/eslint-plugin-template": "^21.0.1",
     "@angular-eslint/template-parser": "^20.6.0",
     "@angular/build": "^20.3.11",
     "@angular/cli": "^20.3.10",