Outdated i18n example

📚 Docs or angular.io bug report

Description

The example i18n project referenced in the latest documentation is using old (<9) style localization configuration, and the source code does not match the documented instructions

🔬 Minimal Reproduction

What’s the affected URL?**

https://angular.io/guide/i18n#translate-attributes

Expected vs Actual Behavior**

Would have expected a section in the angular.json similar to:

"i18n": {
      "sourceLocale": "en-US",
      "locales": {
        "fr": "src/locale/messages.fr.xlf"
      }
    }

[javiermarinros]

The current docs also indicates to use the parameter --i18nLocale with ng serve or ng build that is no longer available since v9

https://angular.io/guide/i18n#i18n-pipes

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