[Merge] ~lamoura/update-notifier:update-translations into update-notifier:jammy

[Steve Langasek]

Review: Disapprove

Superseded by https://code.launchpad.net/~vorlon/update-notifier/+git/update-notifier/+merge/431236 as discussed
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https://code.launchpad.net/~lamoura/update-notifier/+git/update-notifier/+merge/431234
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