Update actions/checkout digest to 44c2b7a #128

Job	Run time
lint-unit / markdownlint-cli2	5s
lint-unit / check-metadata	4s
lint-unit / markdown-link-check	13s
lint-unit / cookstyle	31s
lint-unit / rspec	36s
lint-unit / yamllint	10s
integration (almalinux-8, default)	1m 42s
integration (almalinux-9, default)	1m 29s
integration (amazonlinux-2023, default)	1m 37s
integration (centos-7, default)	2m 14s
integration (centos-stream-8, default)	2m 5s
integration (centos-stream-9, default)	2m 34s
integration (rockylinux-8, default)	1m 43s
integration (rockylinux-9, default)	1m 34s
	16m 37s

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