Nextcloud container uses a default tag that isn't version dependent
The nextcloud version tag in use 'apache', which may, or may not, change when nextcloud version gets updated. In my case, i'm still on next cloud version 20.0.2, but nextcloud version is 21, but running
make update_one nextcloud didn't pull the new container. One solution to fix this is to version pin the container and update it explicitly instead of an implicit update.