gitignore: add screenlog.* #28

Job	Run time
generate_matrix	1m 1s
update_flake	59s
check_flake	3m 55s
build_images (x86_64, linux, server, proxmox)	16m 32s
build_images (x86_64, linux, server, raw-efi)	16m 0s
build_images (x86_64, linux, server, iso)	46m 5s
build_images (x86_64, linux, bri, proxmox)	4m 38s
build_images (x86_64, linux, bri, raw-efi)	4m 11s
build_images (x86_64, linux, bri, iso)	38m 21s
build_flake (cb)	1m 29s
build_flake (pyEnv)	1m 44s
build_flake (sysdo)	1m 48s
push_update	0s
	2h 16m 43s

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