chore(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 18.2.0 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-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

edc-policy-playground/package-lock.json

@@ -32,7 +32,7 @@
     "@angular-devkit/build-angular": "^18.0.7",
     "@angular-eslint/builder": "18.2.0",
     "@angular-eslint/eslint-plugin": "18.2.0",
-    "@angular-eslint/eslint-plugin-template": "18.2.0",
+    "@angular-eslint/eslint-plugin-template": "20.6.0",
     "@angular-eslint/schematics": "18.3.1",
     "@angular-eslint/template-parser": "18.2.0",
     "@angular/cli": "~18.0.7",