ci: fix artifact up / download #24

Job	Run time
Calculate list of debian distros and docker image tags	7s
build_and_test_backend / test (3.10, ubuntu-latest)	1m 31s
build_and_test_backend / mypy	30s
build_and_test_backend / test (3.11, ubuntu-latest)	1m 33s
build_and_test_backend / pylint	36s
build_and_test_backend / format	23s
build_and_test_frontend / format	41s
build_and_test_frontend / test	45s
build_and_test_frontend / build-app	5m 38s
build_and_test_frontend / build-web	1m 23s
build_and_test_frontend / lint	53s
Build and publish ready made docker containers	3m 15s
Build .deb packages (debian:bookworm)	3m 42s
Deploy demo application	21s
Attach assets to release	0s
	21m 18s

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