message: docs: update i18n docs sample to cater for latest raw-loader version
  `raw-loader` version 2+ which is used in the CLI version 8 introduced a breaking change and now uses `export default` instead of `module.exports`.
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diff: @@ -12,7 +12,7 @@ if (environment.production) {
  // use the require method provided by webpack
  declare const require;
  // we use the webpack raw-loader to return the content as a string
  -const translations = require(`raw-loader!./locale/messages.fr.xlf`);
  +const translations = require('raw-loader!./locale/messages.fr.xlf').default;
  platformBrowserDynamic().bootstrapModule(AppModule, {
  providers: [
  