adapter network backup message garbled

[okastl]

I wonder, what z2m was trying to tell me, the output is garbled.
Two Legrand shutter remotes are missing their link keys in the backup.

  zigbee-herdsman:adapter:zStack:startup:backup fetched adapter network security material table (capacity=2, used=2) +131ms
  zigbee-herdsman:adapter:zStack:startup:backup Following devices with link key are missing from new backup but present o♫�, ��8U��m� +15ms�▬q�, §�♣���, g them back: T☼W��▬q�, §�♣���,
  zigbee-herdsman:controller:log Wrote coordinator backup to 'D:\NB\z2m\zigbee2mqtt\data\coordinator_backup.json' +11s

[Koenkk]

Fixed!

Changes will be available in the dev branch in a few hours from now. (https://www.zigbee2mqtt.io/advanced/more/switch-to-dev-branch.html)