Pin first-party Actions to SHAs #8117

Job	Run time
Ruby analysis (macos-latest, linked)	1m 18s
Ruby analysis (ubuntu-latest, linked)	43s
Ruby analysis (ubuntu-latest, nightly-latest)	45s
Ruby analysis (macos-latest, nightly-latest)	50s
Ruby analysis (macos-latest, default)	1m 6s
Ruby analysis (ubuntu-latest, default)	49s
	5m 31s

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