Immich not updating - stuck at version 2.6.1

How can I update my Immich server to the latest version? I’m on ZimaOS 1.7.0 and my Immich version has been stuck on 2.6.1 for several months now. I have tried to update the version number directly on the Docker container but it does not update. When I change the version number in the Docker container manually, it seems to be downloading something (there is network traffic) and it says that Immich is being installed, but after restarting the container, it is still showing the old version number. How can it be updated? Thanks!

https://community.zimaspace.com/t/immich-server-update-problem/8896/2?u=isanto1306