chore(master): release 3.6.8 [skip-ci]

[github-actions[bot]]

:robot: I have created a release beep boop

3.6.8 (2023-09-18)

Bug Fixes

• readme: Updated readme to trigger package publish (b90d31b)

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[github-actions[bot]]

:robot: Release is at https://github.com/zone-eu/zone-mta/releases/tag/v3.6.8 :sunflower: