refactor(@angular/cli): Add instructions to component zoneless migrat… #1955

Job	Run time
lint	2m 13s
build	32s
build-e2e-windows	21s
e2e-windows	0s
publish-snapshots	-1s
Browser Compatibility Tests	-1s
test	-1s
e2e-package-managers	-1s
e2e	-1s
e2e-snapshots	-1s
	3m 0s

Provide feedback