update build.sh #20

Job	Run time
update_flake	54s
generate_matrix	1m 6s
build_images (x86_64, linux, server, proxmox)	16m 18s
check_flake	4m 3s
build_images (x86_64, linux, server, raw-efi)	16m 13s
build_images (x86_64, linux, server, iso)	40m 36s
build_images (x86_64, linux, bri, proxmox)	4m 23s
build_images (x86_64, linux, bri, raw-efi)	4m 59s
build_images (x86_64, linux, bri, iso)	37m 34s
build_flake (cb)	1m 41s
build_flake (pyEnv)	1m 10s
build_flake (sysdo)	1m 34s
push_update	0s
	2h 10m 31s

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