chore(master): release mailu 1.4.0

[github-actions[bot]]

:robot: I have created a release beep boop

1.4.0 (2023-08-29)

Features

• bump mailu version to 2.0.22 (#296) (17d3b94)

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[github-actions[bot]]

:robot: Release is at https://github.com/Mailu/helm-charts/releases/tag/mailu-1.4.0 :sunflower: