pmb.config.init.boot_size: set to 256 MiB
Increase the boot partition size from 128 MiB to 256 MiB, as we are already close to reaching the current limit. By having twice the size, it should be possible to have atomic replacements of all initramfs related files.
Let's get this in soon, so the images generated for v21.03 have bigger boot partitions already. If all goes well, we can upgrade from v21.03 to the next release without reinstalling, so we want to make sure that we don't run into space problems in v21.xx when upgraded like that.
Related: pmaports#1019 (closed), pmaports#1018 (closed)