Verify `ncc` output in CI #82

Job	Run time
Verify `ncc` output is up-to-date	16s
Test action (ubuntu-latest, .)	13s
Test action (ubuntu-latest, subdir)	12s
Test action (windows-latest, .)	28s
Test action (windows-latest, subdir)	1m 6s
Test action (macos-latest, .)	11s
Test action (macos-latest, subdir)	10s
	2m 36s

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