I saw that also and tried, but I'm not booting via UEFI so....
@Inspiron-5570:~/Downloads$ fwupdmgr upgrade
WARNING: UEFI capsule updates not available or enabled in firmware setup
See https://github.com/fwupd/fwupd/wiki/PluginFlag:capsules-unsupported for more information.
WARNING: UEFI firmware can not be updated in legacy BIOS mode
See https://github.com/fwupd/fwupd/wiki/PluginFlag:legacy-bios for more information.
Devices with no available firmware updates:
• WDC WD10SPZX-75Z10T1
• WDC WDS256G1X0C-00ENX0
No updatable devices