Installer images default root size is to low for updates.

I put mobian-installer-pinephone-phosh-20220814.img on my pinephone, and the default size of the root partition was to low for me to run updates on it.

apt upgrade led to:

update-initramfs: generating /boot/initrd.img-5.15-sunxi64

cpio: write error: no space left on device

I solved it by increasing the size, but i think it should be large enough by default.