sysutils/loaders-update: update to v1.1.0

Upstream changes:

• Added the option to use 'gpart show' instead of 'sysctl kern.disks' to list the disks.
• Added the option to not check the root file system for updating/checking the BIOS loaders.
• Polished some outputs.
• Changed man page accordingly to the new options and added sections Capabilities and Limitations.

PR: 284011