Update 3 files

Pamela Baronerequested to merge
issue/automatic_updates-3484802:3484802-update-tab-and into 3.1.x
  • /automatic_updates_extensions/automatic_updates_extensions.routing.yml
  • /automatic_updates_extensions/automatic_updates_extensions.links.task.yml
  • /automatic_updates_extensions/src/Form/UpdaterForm.php

Closes #3484802

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