release: cut the v21.0.3 release #606

Job	Run time
lint	2m 1s
build	17s
build-e2e-windows	24s
test	0s
Browser Compatibility Tests	0s
publish-snapshots	0s
e2e-snapshots	0s
e2e-package-managers	0s
e2e	0s
e2e-windows	-1s
	2m 41s

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