consistently use ESP label for the EFI system partition

[adrelanos]

change from EFI to ESP for arm64 builds

Use of ESP is more popular.

• https://en.wikipedia.org/wiki/EFI_system_partition
• https://wiki.archlinux.org/title/EFI_system_partition
• https://www.diskpart.com/articles/efi-system-partition-4348.html

If we'd use the long label it would be "EFI system partition" but since we use the short label it should be ESP.

Why bother? Because then later PARTLABEL can be used in /etc/fstab.

https://wiki.archlinux.org/title/fstab#GPT_partition_labels

Any label with spaces is more error-prone.

I haven't found any convention for partition labels but consistency makes sense.

[mika]

Wasn't aware of this, nice catch, thanks! :+1: