update build.sh #25

Job	Run time
generate_matrix	1m 10s
update_flake	57s
check_flake	4m 7s
build_images (x86_64, linux, server, proxmox)	16m 2s
build_images (x86_64, linux, server, raw-efi)	16m 8s
build_images (x86_64, linux, server, iso)	42m 54s
build_images (x86_64, linux, bri, proxmox)	4m 4s
build_images (x86_64, linux, bri, raw-efi)	4m 8s
build_images (x86_64, linux, bri, iso)	50m 3s
build_flake (cb)	2m 6s
build_flake (pyEnv)	1m 34s
build_flake (sysdo)	1m 5s
push_update	0s
	2h 24m 18s

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