Check this out.
Manually updating Umbrel node
To manually update your node using SSH access.
Make a channels backup. Go to Umbrel dashboard - Lightning and on the right top side, 3 dots, save backup on your local PC.
A. For Rasp Pi users:
Enter using SSH into your Umbrel node, then run:
cd ~/umbrel && sudo ./scripts/update/update --repo getumbrel/umbrel#v0.4.8
Replace v0.4.8 with the version you want to update to.
If the update was stuck in update, run this before the above command:
sudo rm statuses/update-in-progress
sudo rm statuses/update-status.json
Restart your node if is done OK:
sudo reboot