build(deps): bump dawidd6/action-download-artifact from 2 to 6 in /.github/workflows #2

Job	Run time
Build Linux static (Nix)	10s
Build Linux (Cabal, GHC 8.10.7)	15m 53s
Build aarch64 (Cabal)	0s
Build Linux (Cabal, GHC 9.2.4)	15m 6s
Build Linux (Stack)	16m 48s
Build MacOS (Stack)	6s
Get FreeBSD build from CirrusCI	3s
Lint & check code style	10s
Build Windows (Stack)	9m 35s
Test memory (Nix)	10s
Test (Nix)	3h 8m 11s
Test PG 9.6 (Nix)	13s
Test PG 10 (Nix)	10s
Test PG 11 (Nix)	11s
Test PG 12 (Nix)	11s
Test PG 13 (Nix)	11s
Test PG 14 (Nix)	10s
Test PG 15 (Nix)	10s
Prepare release	0s
Release on Docker Hub	0s
Release on GitHub	0s
Remove copied files from server	0s
	4h 7m 28s

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