Update actions/checkout digest to b4ffde6 - autoclosed #161

Job	Run time
lint-unit / check-metadata	4s
lint-unit / cookstyle	35s
lint-unit / markdown-link-check	24s
lint-unit / markdownlint-cli2	5s
lint-unit / rspec	41s
lint-unit / yamllint	10s
integration (almalinux-8, default)	1m 37s
integration (almalinux-8, all)	3m 43s
integration (almalinux-9, default)	1m 41s
integration (almalinux-9, all)	3m 30s
integration (amazonlinux-2023, default)	1m 36s
integration (amazonlinux-2023, all)	3m 27s
integration (centos-7, default)	1m 40s
integration (centos-7, all)	2m 5s
integration (centos-stream-8, default)	2m 34s
integration (centos-stream-8, all)	11m 58s
integration (centos-stream-9, default)	2m 17s
integration (centos-stream-9, all)	8m 40s
integration (oraclelinux-7, default)	1m 53s
integration (oraclelinux-7, all)	2m 4s
integration (oraclelinux-8, default)	2m 43s
integration (oraclelinux-8, all)	6m 52s
integration (oraclelinux-9, default)	1m 56s
integration (oraclelinux-9, all)	4m 5s
integration (rockylinux-8, default)	1m 49s
integration (rockylinux-8, all)	4m 21s
integration (rockylinux-9, default)	2m 7s
integration (rockylinux-9, all)	3m 25s
	1h 18m 2s

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