Merge pull request #335 from ElementsProject/nix-update-workflow #857

Job	Run time
unit-tests	20s
integration-tests (bitcoin-cln)	19m 21s
integration-tests (bitcoin-lnd)	21m 9s
integration-tests (liquid-cln)	18m 17s
integration-tests (liquid-lnd)	19m 16s
integration-tests (misc-integration)	18m 40s
integration-tests (lwk-cln)	17m 10s
integration-tests (lwk-lnd)	18m 57s
	2h 13m 10s

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