build: enable the ng-dev auth service (angular#48361)

Enable the auth service for merging into the repository

PR Close angular#48361

Author: josephperrott

.ng-dev/github.mts

@@ -8,4 +8,5 @@ export const github: GithubConfig = {
   owner: 'angular',
   name: 'angular',
   mainBranchName: 'main',
+  useNgDevAuthService: true,
 };