Update actions/checkout digest to b4ffde6 - autoclosed #200

Job	Run time
lint-unit / cookstyle	42s
lint-unit / markdown-link-check	16s
lint-unit / check-metadata	7s
lint-unit / markdownlint-cli2	6s
lint-unit / rspec	48s
lint-unit / yamllint	8s
integration-macos	10m 19s
integration (almalinux-8, default)	6m 1s
integration (centos-7, default)	6m 29s
integration (centos-stream-8, default)	7m 42s
integration (debian-10, default)	7m 18s
integration (debian-11, default)	5m 37s
integration (rockylinux-8, default)	5m 57s
integration (ubuntu-1804, default)	5m 56s
integration (ubuntu-2004, default)	6m 47s
integration (ubuntu-2204, default)	8m 28s
Final Results	1s
	1h 12m 42s

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