Update actions/checkout action to v4 (#155) #150

Job	Run time
lint-unit / markdown-link-check	15s
lint-unit / check-metadata	0s
lint-unit / markdownlint-cli2	4s
lint-unit / cookstyle	38s
lint-unit / rspec	45s
lint-unit / yamllint	13s
integration (almalinux-8, package)	1m 59s
integration (almalinux-8, source)	3m 3s
integration (almalinux-8, check)	1m 56s
integration (centos-7, package)	2m 10s
integration (centos-7, source)	3m 18s
integration (centos-7, check)	2m 21s
integration (centos-stream-8, package)	3m 9s
integration (centos-stream-8, source)	4m 9s
integration (centos-stream-8, check)	3m 38s
integration (debian-10, package)	2m 19s
integration (debian-10, source)	3m 2s
integration (debian-10, check)	2m 59s
integration (debian-11, package)	2m 3s
integration (debian-11, source)	2m 56s
integration (debian-11, check)	1m 48s
integration (ubuntu-1804, package)	2m 7s
integration (ubuntu-1804, source)	3m 1s
integration (ubuntu-1804, check)	2m 46s
integration (ubuntu-2004, package)	2m 41s
integration (ubuntu-2004, source)	3m 13s
integration (ubuntu-2004, check)	2m 18s
integration (opensuse-leap-15, package)	2m 22s
integration (opensuse-leap-15, source)	4m 34s
integration (opensuse-leap-15, check)	1m 53s
integration (rockylinux-8, package)	1m 55s
integration (rockylinux-8, source)	3m 38s
integration (rockylinux-8, check)	1m 48s
	1h 15m 1s

Provide feedback