Update Actions to v7 (#48) #115

Job	Run time
lint-unit / runner / yamllint	8s
lint-unit / runner / markdownlint	3s
lint-unit / runner / RSpec ubuntu-latest	43s
lint-unit / runner / Cookstyle	25s
lint-unit / runner / actionlint	8s
lint-unit / runner / Check Metadata	0s
lint-unit / runner / linkspector	0s
integration (windows-server-2019, default)	18s
integration (windows-server-2016, default)	19s
	2m 4s

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