`manjaro-chroot -a` fails to autodetect on btrfs partitions

[ParadaCarleton]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Install manjaro on a btrfs partition
2. Boot into a live environment
3. Run manjaro-chroot -a

Expected behavior
Should mount the partition.

Environment:

• Desktop Environment: GNOME
• Kernel Version: 6.12.48-1
• Manjaro Version: 25.10
• Graphics Driver: NVIDIA
• Device: Laptop