fix: fatal translations error to make CI run again

[OmarIthawi]

The fatal error is merely a missing \n at the end of a translation. Apparently, that makes gettext validators panic.

Also fixed it on both new and old Transifex projects.
This is a follow up for #1003

Why a manual fix?

• Automated updates will stay broken until this specific resource is fixed by a Transifex PR for this specific resource.

• The timing isn't guaranteed so I've gone and fixed it myself. This should be that last fix we need to do manually if the process goes as planned.

This contribution is part of the FC-0012 project which is sparked by the Translation Infrastructure update OEP-58.

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[OmarIthawi]

Apparently transifex was faster than expected.

• Closing as duplicate of: Updates for file translations/edx-ora2/openassessment/conf/locale/en/LC_MESSAGES/django.po in ar on branch main #1029

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