chore: bump @angular-eslint/builder from 20.4.0 to 20.6.0 (#1383)

Bumps [@angular-eslint/builder](https://github.com/angular-eslint/angular-eslint/tree/HEAD/packages/builder) from 20.4.0 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/builder/CHANGELOG.md)
- [Commits](https://github.com/angular-eslint/angular-eslint/commits/v20.6.0/packages/builder)

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

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Author: dependabot[bot]

package-lock.json

@@ -32,7 +32,7 @@
   },
   "devDependencies": {
     "@angular-builders/jest": "^20.0.0",
-    "@angular-eslint/builder": "^20.4.0",
+    "@angular-eslint/builder": "^20.6.0",
     "@angular-eslint/eslint-plugin": "20.3.0",
     "@angular-eslint/eslint-plugin-template": "20.3.0",
     "@angular-eslint/schematics": "^20.4.0",