chore: bump @angular-eslint/eslint-plugin-template from 20.3.0 to 20.6.0

Bumps [@angular-eslint/eslint-plugin-template](https://github.com/angular-eslint/angular-eslint/tree/HEAD/packages/eslint-plugin-template) from 20.3.0 to 20.6.0.
- [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/v20.6.0/packages/eslint-plugin-template)

---
updated-dependencies:
- dependency-name: "@angular-eslint/eslint-plugin-template"
  dependency-version: 20.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -34,7 +34,7 @@
     "@angular-builders/jest": "^20.0.0",
     "@angular-eslint/builder": "^20.4.0",
     "@angular-eslint/eslint-plugin": "20.3.0",
-    "@angular-eslint/eslint-plugin-template": "20.3.0",
+    "@angular-eslint/eslint-plugin-template": "20.6.0",
     "@angular-eslint/schematics": "^20.4.0",
     "@angular-eslint/template-parser": "20.3.0",
     "@angular/animations": "^20.3.3",