Bump cygwin/cygwin-install-action from 4 to 5 #2335

Job	Run time
lint	24s
unit-tests (ubuntu-latest, dash, 4)	2m 17s
coverage	4m 19s
integration-tests (ubuntu-latest, dash, 4)	1m 34s
unit-tests (windows-latest, bash, 1)	9m 54s
unit-tests (windows-latest, cygwin, 1)	7m 3s
unit-tests (windows-latest, wsl, 4)	6m 53s
unit-tests (macos-latest, bash 3.2, 4)	2m 46s
unit-tests (macos-latest, bash 3.2 with coreutils, 4)	3m 10s
unit-tests (ubuntu-latest, registry.access.redhat.com/ubi8/ubi-minimal, bash 4.4, 4)	2m 13s
unit-tests (ubuntu-latest, alpine, zsh, 4)	2m 27s
unit-tests (ubuntu-latest, alpine, ash, 4)	2m 5s
unit-tests (ubuntu-latest, ubuntu:22.04, posh, 4)	2m 24s
report	6s
	47m 35s

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