Update README to reflect current Lightning Cloud features #3008

Job	Run time
check-schema / schema	10s
check-package / pkg-build (ubuntu-latest)	22s
check-package / merge-artifacts	11s
check-package / pkg-check (windows-latest, 3.10)	1m 17s
check-package / pkg-check (macos-latest, 3.10)	50s
check-package / pkg-check (ubuntu-latest, 3.10)	31s
check-package / pkg-guardian	2s
	3m 23s

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