main/nvme-cli: upgrade to 2.7.1
https://github.com/linux-nvme/nvme-cli/releases/tag/v2.7.1
Reverts a breaking change affecting field names in the JSON output.
https://github.com/linux-nvme/nvme-cli/releases/tag/v2.7.1
Reverts a breaking change affecting field names in the JSON output.