You can't "move" libraries, but you can add a new folder to the existing library. Open the library settings and click the "+" at the top to add your new folder. Then the "-" next to the old folder to remove it.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)