Update README to reflect inference engines terminology (#625) #2959

Job	Run time
check-package / pkg-build (ubuntu-latest)	18s
check-schema / schema	25s
check-package / merge-artifacts	17s
check-package / pkg-check (ubuntu-latest, 3.10)	31s
check-package / pkg-check (macos-latest, 3.10)	1m 9s
check-package / pkg-check (windows-latest, 3.10)	1m 2s
check-package / pkg-guardian	3s
	3m 45s

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